Erectile Dysfunction: The Complete Guide to Causes, Blood Tests, and Finding the Real Reason It's Happening

Contents

1. What erectile dysfunction actually is and what it isn't
2. How common is ED in the UK? The real numbers
3. The two types of ED: physical vs psychological and why it's rarely just one
4. Physical causes of erectile dysfunction: complete breakdown
5. Psychological causes of erectile dysfunction: what doctors miss
6. What blood tests for erectile dysfunction actually check and what they miss
7. Why your blood test came back normal but you still have ED
8. Erectile dysfunction under 40: why it's different
9. Porn-induced erectile dysfunction (PIED): what the evidence says
10. Why Viagra stopped working - the real reasons
11. The complete ED assessment: what a proper diagnosis looks like
12. How Medimob's ED assessment works
13. FAQ
14. References

1. What Erectile Dysfunction Actually Is and What It Isn't

Erectile dysfunction (ED) is defined clinically as the persistent inability to achieve or maintain an erection sufficient for satisfactory sexual intercourse (NIH Consensus Development Panel, 1993). The word persistent matters. An occasional difficulty getting or keeping an erection is normal, it happens to virtually every man at some point, particularly under stress, after alcohol, when exhausted, or during illness.

ED becomes a clinical concern when:

• It happens consistently (more than 50% of attempts) over a period of at least three months
• It causes you significant personal distress
• It affects your relationship or quality of life
• It is new behaviour that represents a clear change from your normal function

It is not a diagnosis of failure, age, or low masculinity. It is a symptom, and like all symptoms, it has a cause. Finding that cause is the entire point.

2. How Common Is ED in the UK? The Real Numbers

Erectile dysfunction is far more common than most men realise and far more common than most men admit to their doctors.

• 41.5% of men in the UK report experiencing ED, based on a prospective real-world study of 12,490 UK men (Li et al., 2022)
• 58.2% of men report experiencing ED at some point in their lives (LloydsPharmacy survey, 2024)
• 50-55% of British men aged 40-70 experience ED to some degree (The Independent Pharmacy, 2024)
• 7.5% of UK men live with severe ED: consistent, significant difficulty on almost every occasion (Li et al., 2022)
• ED is more common than heart disease and cancer among men aged 40–70 in the UK (Vale Health Clinic, citing BJU International, 2021)
• 74.6% of men aged 25–34 report experiencing ED during sexual encounters, making younger men, not older men, the most affected age group by frequency (Click2Pharmacy, 2025)
• The NHS issued 3.5 million prescriptions for ED medication between September 2023 and August 2024, that's 25.5 million pills (LloydsPharmacy, 2024)
• Less than 50% of men with ED choose to seek medical advice (ED Clinics UK)

The stigma around ED means these numbers almost certainly underestimate the true picture. Men do not report this to their doctors. They search for answers at 2am instead.

3. The Two Types of ED: Physical vs Psychological and Why It's Rarely Just One

Every discussion of ED eventually arrives at this distinction: is it physical (organic) or psychological (psychogenic)?

The honest clinical answer is: it is usually both, interacting with each other in a feedback loop.

Physical ED occurs when something in the body interferes with the mechanical process of erection: blood flow, nerve signalling, hormonal balance, or structural integrity of penile tissue.

Psychological ED occurs when mental or emotional factors: anxiety, depression, stress, relationship conflict, performance fear, or conditioned arousal patterns from pornography override the body's ability to respond to sexual stimulation.

The feedback loop that most men fall into: A man has one incident of difficulty, perhaps due to stress, alcohol, or a new partner. He becomes anxious about it. The next time, that anxiety itself prevents erection. He becomes more anxious. The cycle deepens until what began as a one-off incident becomes chronic ED driven primarily by performance anxiety, even in a man whose physical health is completely normal.

This is why a blood test alone cannot diagnose erectile dysfunction. It can identify contributing physical factors. But it cannot measure anxiety, assess relationship dynamics, evaluate sleep quality, or detect pornography-conditioned arousal patterns. A blood test is one piece of the picture, not the whole picture.

4. Physical Causes of Erectile Dysfunction: Complete Breakdown

4.1 Cardiovascular Disease and Poor Blood Flow

An erection is, at its most fundamental, a vascular event. Sexual arousal triggers the release of nitric oxide, which relaxes smooth muscle in the penile arteries, allowing blood to flood the corpora cavernosa and create rigidity.

Any condition that impairs blood vessel health impairs erectile function. This is why ED is often described as a sentinel event for cardiovascular disease, the small arteries of the penis show vascular damage years before the larger coronary arteries do.

• Cardiovascular disease is the underlying cause in 40% of ED cases (BAUS; ED Clinics UK)
• Men with ED have a 43% increased risk of cardiovascular disease (Vale Health Clinic)
• Atherosclerosis (hardening and narrowing of arteries) reduces penile blood flow directly
• High blood pressure damages arterial walls and reduces vessel flexibility
• Hypertension is reported in 31.8% of UK men with ED vs 16.3% of men without ED (Li et al., 2022)

What blood tests check for this: Cholesterol (total, LDL, HDL, non-HDL), triglycerides, HbA1c, fasting glucose, ApoB (less commonly), hsCRP (inflammatory marker).

4.2 Diabetes and Blood Sugar

Diabetes causes ED through two mechanisms: vascular damage (same pathway as cardiovascular disease) and neuropathy (nerve damage that disrupts the signalling required for erection).

• Diabetes is the underlying cause in 33% of ED cases (BAUS)
• 15.9% of UK men with ED have diagnosed diabetes vs 6.1% of men without ED (Li et al., 2022)
• Up to 50% of all men with diabetes experience ED (Health Centre UK)
• ED often appears before diabetes is formally diagnosed — making it an early warning sign

What blood tests check for this: HbA1c (3-month average blood glucose), fasting glucose, full metabolic panel.

4.3 Low Testosterone and Hormonal Imbalances

Testosterone plays a complex role in erectile function. It is primarily responsible for libido (sexual desire) rather than the mechanics of erection itself. A man can achieve erections with low testosterone but may have reduced desire to initiate sex.

However, testosterone deficiency contributes to ED through:

• Reduced sexual motivation (no desire = no arousal = no erection)
• Reduced sensitivity to sexual stimulation
• Negative effects on mood, energy, and confidence that compound psychological factors
• Hormonal imbalances account for 11% of ED cases (BAUS), primarily low testosterone and elevated prolactin
• High prolactin (hyperprolactinaemia) directly suppresses testosterone production and can indicate a pituitary adenoma, a condition requiring urgent investigation
• SHBG (Sex Hormone Binding Globulin) determines how much testosterone is free and biologically active. A man with normal total testosterone may have low free testosterone if SHBG is elevated
• Thyroid dysfunction (both hypothyroidism and hyperthyroidism) affects testosterone metabolism and sexual function

What blood tests check for this: Total testosterone, free testosterone (calculated or measured), SHBG, LH (Luteinising Hormone), FSH, prolactin, TSH, free T3, free T4.

4.4 Obesity and Metabolic Syndrome

Adipose (fat) tissue, particularly visceral fat, converts testosterone to oestrogen via aromatase, reducing effective testosterone levels. Obesity also drives insulin resistance, inflammation, and vascular damage, all of which contribute to ED.

Metabolic syndrome - the cluster of obesity, high blood pressure, high blood sugar, and abnormal cholesterol - is strongly associated with ED and often goes undiagnosed until a sexual health concern prompts investigation.

4.5 Medications

Numerous commonly prescribed medications cause or contribute to ED as a side effect. Men are frequently not warned about this:

• Antidepressants (particularly SSRIs — fluoxetine, sertraline, paroxetine): impair ejaculation and reduce libido, and can impair erection quality
• Antihypertensives (beta-blockers, thiazide diuretics): reduce blood pressure throughout the body, including penile arteries
• Antihistamines (particularly older-generation): reduce genital engorgement
• Finasteride (hair loss treatment): post-finasteride syndrome has been associated with persistent sexual dysfunction in some men
• Opioids: suppress testosterone production via the hypothalamic-pituitary axis
• Recreational drugs: cocaine causes vasospasm; MDMA and alcohol impair erection acutely; cannabis has complex and variable effects

If you take any of these and have developed ED since starting them, this is the first conversation to have with your prescribing doctor.

4.6 Neurological Causes

The nervous system mediates the entire erectile response — from central arousal in the brain through spinal pathways to the peripheral nerves of the penis. Damage at any point disrupts this chain:

• Multiple sclerosis
• Parkinson's disease
• Spinal cord injury or surgery
• Pelvic surgery (prostatectomy, colorectal surgery)
• Diabetic neuropathy (as above)
• 76% of men treated for prostate cancer experience ED (LloydsPharmacy; Prostate Cancer UK)

Blood tests cannot detect neurological causes directly. These require clinical examination and, where indicated, specialist neurological assessment.

4.7 Sleep Disorders

Sleep - particularly deep, restorative sleep - is when nocturnal penile tumescence (NPT) occurs. Healthy men experience 3–5 erections per night during REM sleep. These nocturnal erections are not about arousal; they are the body's mechanism for oxygenating penile tissue and maintaining erectile health.

Obstructive sleep apnoea (OSA) disrupts sleep architecture, reduces NPT, drives testosterone suppression through disrupted growth hormone release, and increases cardiovascular risk. It is severely underdiagnosed and directly causes ED in a significant proportion of men who attribute their dysfunction to age or stress.

If you snore loudly, wake unrefreshed, or your partner reports that you stop breathing during sleep, OSA should be evaluated before assuming a psychological cause.

5. Psychological Causes of Erectile Dysfunction: What Doctors Miss

5.1 Performance Anxiety

Performance anxiety is the most common psychological cause of ED and the most commonly overlooked by standard medical assessment.

It operates through a simple physiological mechanism: anxiety activates the sympathetic nervous system (fight-or-flight). Adrenaline and noradrenaline cause vasoconstriction, the narrowing of blood vessels. Erection requires vasodilation, widening of blood vessels. Anxiety and erection are physiologically incompatible.

A man experiencing performance anxiety often finds he can achieve erection during masturbation but not with a partner. He may achieve erection initially but lose it during sex. He may find erections return during a period of relaxation (a holiday, a new relationship, reduced stress), only to disappear again.

5.2 Depression and Generalised Anxiety Disorder

• Men with ED screen positive for depression at nearly double the rate of men without ED: 24.3% vs 14.6% (Li et al., 2022, using PHQ-2)
• Anxiety is reported in 23.3% of UK men with ED vs 16.6% of men without ED (Li et al., 2022)
• Depression reduces libido, reduces dopaminergic reward signalling, impairs sleep, and elevates cortisol, all of which suppress erectile function
• Critically: antidepressants used to treat depression also commonly cause sexual dysfunction, creating a situation where the treatment worsens the symptom

5.3 Relationship Factors and Partner Dynamics

Unresolved conflict, communication breakdown, lack of emotional intimacy, trust issues, and sexual incompatibility all contribute to ED in ways that no blood test will ever reveal. A man may function normally with one partner and experience ED with another, demonstrating clearly that the cause is situational and relational.

5.4 Pornography-Induced Erectile Dysfunction (PIED)

This is one of the fastest-growing causes of ED in men under 40 and one of the most poorly addressed by conventional medical assessment.

The mechanism is neurological: chronic pornography consumption drives dopamine desensitisation in the brain's reward circuitry. Over time, increasingly novel or extreme content is required to produce the same arousal response. Real-world partnered sex - which involves less novelty, less visual stimulation, and the unpredictability of another person - fails to meet the conditioned threshold for arousal.

• The Kinsey Institute recognised pornography-induced erectile dysfunction (PIED) as a real phenomenon in 2007
• 67% of men with ED report they never experience erectile difficulties when masturbating with pornography (consumer surveys cited in Click2Pharmacy, 2025)
• Google searches for "porn induced erectile dysfunction" have reached all-time highs in 2024 (Click2Pharmacy, 2025)
• In men under 40, more than 85% of ED cases have psychological causes as the primary driver (Hims, citing research data)

PIED is not assessed by any commercially available blood test. It requires a detailed sexual history including masturbation habits, pornography use patterns, and comparison of erectile function during solo vs partnered activity.

5.5 Stress: Chronic and Acute

Cortisol - the primary stress hormone - directly suppresses testosterone production via the hypothalamic-pituitary-adrenal axis. Sustained high stress = sustained cortisol elevation = testosterone suppression. This creates a hormonal picture that may appear as low-normal testosterone on a blood test without revealing the underlying driver.

Work stress, financial pressure, bereavement, and major life transitions commonly precede the onset of ED - yet this history is rarely elicited in a standard GP appointment.

6. What Blood Tests for Erectile Dysfunction Actually Check and What They Miss

A standard ED blood panel checks for identifiable physical causes. Here is what each marker means:

What blood tests cannot assess:

• Performance anxiety
• Depression severity (beyond a crude inflammatory correlation)
• Relationship dynamics
• Sleep quality and sleep apnoea risk
• Pornography use patterns
• Situational vs generalised ED
• Medication side effects
• Neurological integrity
• Penile vascular health (requires Doppler ultrasound)

This is the fundamental gap in standard ED care. A blood test is necessary but not sufficient. It is one dimension of a multi-dimensional problem.

7. Why Your Blood Test Came Back Normal But You Still Have ED

This is the most searched, most frustrated question in men's sexual health.

You got tested. Everything came back in range. The GP said "nothing to worry about" or prescribed Viagra anyway. And you still have ED.

Here is what's likely happening:

Reason 1: The blood test was correct and your cause is psychological

If testosterone, glucose, cholesterol, thyroid, and liver function are all normal, the cause is almost certainly psychological, neurological, or relational. A normal blood panel in a symptomatic man is itself diagnostic information, it redirects the investigation toward sleep, mental health, relationship factors, and sexual history.

Reason 2: The blood test was taken at the wrong time

Testosterone peaks in the morning, typically between 7–10am. A blood test taken in the afternoon can show a value 20–35% lower than the morning peak. Many GP blood tests are taken at whatever time is available, meaning a morning-dependent hormone is measured at 3pm and returned as "low normal" when it would be clearly normal at the right time.

Reason 3: Your free testosterone is low even if total testosterone is normal

If SHBG is elevated, more testosterone is bound to this protein and unavailable to tissues. Total testosterone appears normal; free testosterone (the biologically active fraction) is low. Many standard panels test only total testosterone. This misses a clinically significant finding.

Reason 4: The reference range includes men who have sexual dysfunction

Laboratory reference ranges are calculated from population distributions. "Normal" testosterone range includes men at the bottom 2.5% of the population, men who may have symptomatic deficiency. A man with a testosterone of 9 nmol/L is technically "in range" but may be functionally deficient, particularly if symptoms are present. Reference ranges are statistical, not therapeutic.

Reason 5: The panel didn't include the right tests

A standard NHS testosterone test may not include free testosterone, SHBG, LH, FSH, or prolactin. Without the full hormonal picture, a partial result can be falsely reassuring.

Reason 6: The cause is medication-related

If you started a new medication in the 6–12 months before ED appeared, that drug is the most likely cause. This is rarely identified in a standard assessment because no blood test flags it.

8. Erectile Dysfunction Under 40: Why It's Different

ED in younger men is a distinct clinical presentation that requires a different investigative approach.

• 74.6% of men aged 25–34 experience ED during sexual encounters (Click2Pharmacy, 2025)
• In men under 40, more than 85% of ED is primarily psychological in origin (research cited in Hims, 2024)
• The most common causes in under-40s: performance anxiety, PIED, depression, anxiety disorders, relationship factors, recreational drug use, and high-dose cannabis use
• Physical causes in young men, while less common, include: congenital vascular abnormalities, early-onset diabetes (increasingly common), anabolic steroid use (which shuts down natural testosterone production), and Peyronie's disease

A 28-year-old with ED almost certainly has a different cause than a 55-year-old with ED. Assessment must reflect this. Giving a 28-year-old Viagra without assessing his pornography consumption, sleep quality, anxiety levels, and relationship history is not adequate care, it is pattern-matching without diagnosis.

9. Porn-Induced Erectile Dysfunction (PIED): What the Evidence Says

Pornography-induced erectile dysfunction deserves dedicated attention because it is the fastest-growing cause of ED in young men and the most systematically ignored by conventional medical assessment.

The mechanism: Repeated exposure to pornographic content drives neuroadaptation in the brain's dopaminergic reward system. The brain requires increasingly novel, intense, or specific content to produce the same level of arousal. This is the same mechanism underlying substance tolerance. When a man with conditioned pornography use attempts partnered sex — which involves less novelty, less control, and reciprocal demands — the dopaminergic threshold for arousal is not met. Erection fails.

The clinical presentation: Men with PIED typically report:

• Normal or superior erectile function during solo masturbation with pornography
• Difficulty achieving or maintaining erection with a partner
• Need for mental imagery or pornographic fantasy during partnered sex
• Escalation of pornography use over time, requiring increasingly extreme content
• Often, the condition develops gradually and the man does not connect it to pornography

The assessment gap: No commercially available blood test screens for PIED. No hormonal marker identifies it. It requires a detailed, non-judgemental clinical history covering masturbation frequency, pornography use duration and content escalation, and comparison of erectile function in solo vs partnered contexts.

The evidence: A 2014 survey found that the more pornography a man watched, the more likely he was to have concerns about sexual performance and reduced enjoyment during partnered sex (cited in Hims). The Kinsey Institute recognised the phenomenon in 2007. Google search data from 2024 confirms growing public awareness and concern. Clinical resolution typically requires pornography abstinence for 60–90+ days combined with psychosexual therapy.

10. Why Viagra Stopped Working - The Real Reasons

Sildenafil (Viagra) and tadalafil (Cialis) are PDE5 inhibitors, they enhance blood flow to the penis by preventing the breakdown of cyclic GMP. They work in approximately 73% of men when taken correctly (LloydsPharmacy). When they stop working, or never worked, there are specific reasons:

The medication only treats vascular ED. If the cause is primarily psychological, neurological, or hormonal rather than vascular, PDE5 inhibitors will have limited effect. They cannot reduce performance anxiety. They cannot replace absent testosterone. They cannot repair damaged nerves.

Incorrect use accounts for 56–81% of treatment failures (American Urological Association). Common errors:

• Taking Viagra after a large, high-fat meal (delays absorption by up to 2 hours)
• Taking it without sufficient sexual stimulation (the drug enhances, not creates, arousal)
• Taking it with alcohol (alcohol is a vascular depressant and counters the drug's mechanism)
• Using an insufficient dose (50mg may not be adequate; 100mg is often more effective)
• Not waiting long enough (sildenafil takes 30–60 minutes to reach peak levels on an empty stomach)

The underlying condition has progressed. A man for whom Viagra worked five years ago may find it no longer works if the underlying cardiovascular disease, diabetes, or other physical condition has advanced significantly. The drug works by enhancing existing vascular function, it cannot compensate for severe arterial disease.

Psychological factors have developed on top of physical causes. A man who initially had mild vascular ED may now have layered performance anxiety on top of it. The physical component responds to Viagra; the psychological component does not.

The cause was never vascular. If Viagra never worked — not once — the cause is most likely not primarily vascular. This is important information that should redirect assessment toward neurological, hormonal, or psychological causes.

11. The Complete ED Assessment: What a Proper Diagnosis Looks Like

A comprehensive assessment of erectile dysfunction includes all of the following. If your assessment did not include these elements, you do not have a complete picture:

Clinical History

• Onset, duration, and progression of ED
• Situational vs generalised (does it happen always, or only in specific contexts?)
• Morning erections - presence or absence is a key clinical indicator (present = more likely psychological; absent = more likely vascular or hormonal)
• Sexual and relationship history
• Psychological history: anxiety, depression, trauma, stress
• Sleep quality and quantity
• Masturbation habits and pornography use
• Medications, supplements, and recreational drug use
• Lifestyle: exercise, diet, smoking, alcohol

Validated Clinical Questionnaires

• IIEF-5 (Sexual Health Inventory for Men) — validated 5-question erectile function severity scale
• PHQ-9 - validated 9-question depression severity scale
• GAD-7 - validated 7-question generalised anxiety severity scale
• Pittsburgh Sleep Quality Index - validated 19-item sleep quality assessment

Physical Examination

• Blood pressure measurement
• Genital examination (penile anatomy, testicular size and consistency)
• Assessment of secondary sexual characteristics (body hair, gynecomastia)

Blood Tests Full panel as described in Section 6, including free testosterone, SHBG, prolactin, LH, FSH, thyroid function, metabolic markers, and inflammatory markers. Taken fasting, in the morning (7–10am) for accurate testosterone measurement.

Synthesis and Interpretation All of the above combined into a clinical assessment that identifies the most likely primary and secondary causes, and provides a clear, specific recommended pathway, not just a repeat prescription.

This is what a proper diagnosis looks like. This is what Medimob offers.

12. How Medimob's ED Assessment Works

Most ED services in the UK give you a blood test and a pill. Medimob gives you an answer.

Our Complete ED Assessment combines a venous blood draw at your home (more accurate than finger-prick kits) with a comprehensive clinical questionnaire covering every dimension of the assessment described above - sleep, mood, anxiety, sexual history, relationship factors, and pornography use - all reviewed by our partner GMC-registered GP.

What you get:

1. Free screening questionnaire: takes 3 minutes, based on the validated IIEF-5, gives you an immediate severity score
2. Full clinical questionnaire: if you decide to commit to it and pay for the full assessment, you will be asked to complete a deep-dive questionnaire covering every relevant dimension of your sexual and general health
3. Venous blood draw at your home: a qualified phlebotomist comes to you, anywhere in the UK
4. GP-authored report in 48 hours: plain English, structured in five sections: your blood results explained, your clinical profile, most likely primary cause, recommended next steps, and any urgent flags
5. Optional 20-minute follow-up call with the GP to discuss the report

This is not a diagnosis. It is a comprehensive clinical opinion.Tthe most complete picture of your erectile function you can get outside a urology department. It tells you what's most likely causing your ED, and exactly who to see next.

"Medimob's assessment is for men who have already tried the obvious routes and still don't have a real answer."

This assessment is for information and educational purposes only. It does not constitute a medical diagnosis. The GP report is a private clinical opinion designed to help you identify appropriate next steps. Medimob does not prescribe medication.

Frequently Asked Questions (FAQ)

What are the most common causes of erectile dysfunction?

The most common physical causes are cardiovascular disease (40% of cases), diabetes (33%), hormonal imbalances including low testosterone (11%), and neurological disorders (10%), according to the British Association of Urological Surgeons. Psychological causes, including performance anxiety, depression, and pornography-induced ED, are the primary driver in approximately 10–20% of all cases overall, rising to over 85% of cases in men under 40.

Can a blood test diagnose erectile dysfunction?

No. A blood test can identify contributing physical factors such as low testosterone, diabetes, high cholesterol, or thyroid dysfunction, but it cannot assess psychological causes, sleep disorders, medication effects, relationship factors, or pornography-related conditioning. A complete ED assessment requires clinical history, validated questionnaires, and blood tests interpreted together.

Why did my blood test come back normal but I still have ED?

The most likely reasons are: your cause is primarily psychological (performance anxiety, depression, or PIED); your free testosterone is low even though total testosterone is within range (due to elevated SHBG); the test was taken at the wrong time of day (testosterone should be measured fasting, in the morning); the panel was incomplete; or a medication you are taking is causing sexual side effects.

What blood tests should I have for erectile dysfunction?

A comprehensive ED blood panel should include: total testosterone, free testosterone (calculated or measured), SHBG, LH, FSH, prolactin, TSH, free T3, free T4, HbA1c, fasting glucose, full lipid panel (total cholesterol, LDL, HDL, triglycerides), liver function (ALT, AST, GGT), kidney function (creatinine, eGFR), full blood count, vitamin D, and CRP. Tests should be taken fasting, between 7–10am.

Is erectile dysfunction psychological or physical?

In most men, it is both physical and psychological factors interact in a feedback loop. Cardiovascular disease, diabetes, and hormonal issues cause the physical component; performance anxiety, depression, and stress compound it. In men over 40, physical causes predominate. In men under 40, psychological causes, particularly performance anxiety and pornography-induced ED, are the primary driver in over 85% of cases.

Can erectile dysfunction be cured?

Many causes of ED are entirely reversible with the right intervention. ED caused by medication side effects resolves when the medication is changed. ED caused by obesity often resolves with significant weight loss. ED caused by sleep apnoea often resolves with CPAP treatment. ED caused by performance anxiety resolves with psychosexual therapy, typically within 6–12 sessions. ED caused by pornography use resolves with sustained abstinence and therapeutic support. ED caused by advanced cardiovascular disease or nerve damage may be managed but not reversed.

Does erectile dysfunction go away on its own?

Situational or stress-related ED often resolves when the underlying stressor is removed. However, ED that has persisted for more than three months without an identifiable acute cause is unlikely to resolve without intervention. Early assessment is associated with better outcomes and ED is frequently an early warning sign of cardiovascular or metabolic conditions that benefit from early treatment.

What is porn-induced erectile dysfunction (PIED)?

PIED is erectile dysfunction caused by neuroadaptation in the brain's reward system following chronic pornography use. The brain becomes conditioned to require the specific novelty and stimulation of pornographic content for arousal, and fails to respond adequately to partnered sex. Men with PIED typically can achieve erections normally during solo pornography use but experience difficulty or failure during partnered sex. It is addressed through pornography abstinence and psychosexual therapy.

Why did Viagra stop working?

Common reasons include: the underlying cause is psychological rather than vascular (Viagra only helps vascular ED); incorrect use (taken with food, alcohol, or without adequate arousal); insufficient dose; progression of an underlying condition such as vascular disease; or development of psychological factors on top of the original physical cause. If Viagra has never worked — even once — the cause is most likely not primarily vascular.

At what age does erectile dysfunction start?

ED can occur at any age. Data from the UK shows that men aged 25–34 are the most frequently affected age group by frequency of occurrence. ED is more likely to have a psychological cause in younger men and a physical cause in older men. The prevalence increases with age — approximately 40% of men by age 40, 70% of men by age 70.

Is erectile dysfunction a sign of heart disease?

Yes, ED is now recognised as an early warning sign of cardiovascular disease. The small arteries of the penis are often the first to show signs of vascular disease, years before the coronary arteries. Men with ED have a 43% increased risk of cardiovascular disease. Any man with new-onset ED, particularly over 40, should have cardiovascular risk markers assessed as part of his investigation.

How do I get a proper erectile dysfunction assessment in the UK?

A proper assessment includes a comprehensive clinical history, validated questionnaires (IIEF-5, PHQ-9, GAD-7, sleep assessment), a full morning fasting blood panel, and synthesis by a qualified clinician. Medimob's Complete ED Assessment delivers all of this — with a venous blood draw at your home and a GP-authored report within 48 hours — for men anywhere in the UK.

References

British Association of Urological Surgeons (BAUS). Erectile Dysfunction (Impotence). Available at: baus.org.uk

Click2Pharmacy. (2025). Erectile Dysfunction Statistics UK 2025. Available at: click2pharmacy.co.uk

ED Clinics UK. (2025). UK Erectile Dysfunction Statistics: How Common Is It & Why? Available at: edclinics.co.uk

Hims. (2024). Why Is Viagra Not Working for Me? Available at: hims.com

Healthline. (2024). Viagra Not Working Anymore? Tips and Other Options for ED. Updated October 23, 2024.

Li, H., et al. (2022). Prevalence, Comorbidities, and Risk Factors of Erectile Dysfunction: Results from a Prospective Real-World Study in the United Kingdom. International Journal of Clinical Practice. Wiley Online Library. doi: 10.1155/2022/5229702

LloydsPharmacy Online Doctor. (2024). Erectile Dysfunction: 50+ Facts and Statistics. Survey of 500 adult men in the UK, November 2024.

NIH Consensus Development Panel on Impotence. (1993). NIH Consensus Conference: Impotence. JAMA, 270(1), 83–90.

Rosen, R.C., et al. (1997). The International Index of Erectile Function (IIEF): A multidimensional scale for assessment of erectile dysfunction. Urology, 49(6), 822–830.

Sciencedirect. (2022). Relationship Between Age, Comorbidity, and the Prevalence of Erectile Dysfunction. Available at: sciencedirect.com

The Independent Pharmacy. (2024). Erectile Dysfunction in the UK — What the Statistics Say. Available at: theindependentpharmacy.co.uk

Vale Health Clinic. (2023). Prevalence of Erectile Dysfunction in the UK. Citing BJU International, 2021.

Kroenke, K., Spitzer, R.L., & Williams, J.B.W. (2001). The PHQ-9: Validity of a brief depression severity measure. Journal of General Internal Medicine, 16(9), 606–613.

Spitzer, R.L., et al. (2006). A brief measure for assessing generalized anxiety disorder: The GAD-7. Archives of Internal Medicine, 166(10), 1092–1097.

Buysse, D.J., et al. (1989). The Pittsburgh Sleep Quality Index: A new instrument for psychiatric practice and research. Psychiatry Research, 28(2), 193–213.