Erectile dysfunction: causes, and why it's worth getting checked
ED affects millions of UK men and is highly treatable — but it can also be an early warning sign. A GP-reviewed guide to causes and treatment.
Erectile dysfunction affects an estimated 4.3 million men in the UK — around half of men over 40 experience it to some degree. Two things about it are under-appreciated: it’s very treatable, and it’s sometimes the first visible sign of something else worth knowing about.
Why does erectile dysfunction happen?
An erection is fundamentally a blood-flow event, coordinated by nerves and hormones and heavily influenced by your state of mind. Anything that affects those systems can cause ED:
Circulation and metabolism
High blood pressure, high cholesterol, diabetes and smoking all narrow or stiffen blood vessels. Because the arteries involved are small, ED can show up years before heart problems do — which is why new, persistent ED in a younger man deserves a proper check, not just a pill.
Psychology and relationships
Stress, anxiety (including performance anxiety), depression and relationship strain are major drivers, especially in younger men. The mind and body loop into each other — one bad experience creates anxiety that causes the next.
Medicines and lifestyle
Some antidepressants, blood-pressure treatments and hair-loss medicines can contribute, as can alcohol, recreational drugs and long-distance cycling. Never stop a prescribed medicine without speaking to a clinician.
Hormones
Low testosterone is a less common primary cause but worth checking when other symptoms fit (low mood, fatigue, reduced libido).
How is ED treated in the UK?
Tablet treatments that improve blood flow are highly effective for most men and have been used safely for decades. They’re prescription-only in the UK (one format is available from pharmacies after consultation), and assessment matters: these tablets interact dangerously with some heart medicines.
Beyond tablets, addressing the underlying cause — fitness, weight, smoking, alcohol, stress, sleep — often improves things substantially. For psychological ED, talking therapies work well.
Read our full guide to ED tablet types and safe online supply.
When should you see a doctor about ED?
Seek prompt assessment if ED is:
- Sudden and complete
- Associated with pelvic trauma or surgery
- Accompanied by chest pain, breathlessness on exertion, or neurological symptoms
- Linked to painful erections or penile deformity
Otherwise, a confidential online assessment is a reasonable first step at a regulated UK clinic.
The takeaway
ED is common, fixable, and occasionally informative. A confidential online assessment takes minutes, and a registered clinician can both treat the symptom and make sure nothing more important is hiding behind it.
Who should skip this?
Skip jumping straight to tablets if you have chest pain on exertion, a new heart diagnosis, or you take nitrate medicines — that is a GP/cardiology conversation. Skip if ED is sudden with other neurological signs. Skip unregulated herbal ED imports; we will not name prescription ED brands here.
NHS, high-street pharmacy, or online clinic?
GPs look for heart disease, diabetes, hormones and medicines that cause ED. Online clinics can assess a private tablet pathway after history. Cause-finding still matters: ED can be an early heart-risk marker. GP suits first episode, heart-risk factors, low mood, or you take cardiac medicines. Skip that route if you have recently been cleared and want a private repeat.
How should you choose a route?
| Option | Best for | Skip if |
|---|---|---|
| GP | First episode, heart-risk factors, low mood, or you take cardiac medicines | You have recently been cleared and want a private repeat |
| Online clinic | Known ED, no red flags, you want a private assessment | Chest pain or nitrate medicines |
| Device / counselling | You cannot take tablets, or anxiety is the main driver | You have not had a medical once-over at all |
What should you expect if you go online?
Honest answers about heart medicines matter more than embarrassment. A clinic should refuse when it is unsafe. Lifestyle (smoking, alcohol, sleep) is not a moral lecture; it changes outcomes. GP suits first episode, heart-risk factors, low mood, or you take cardiac medicines. Skip that route if you have recently been cleared and want a private repeat.
Sources
- NHS: erection problems — checked 12 August 2026
- GPhC pharmacy register — checked 12 August 2026
Frequently asked questions
What is the main cause of erectile dysfunction?
There is rarely one cause. Blood-flow problems (linked to blood pressure, cholesterol, diabetes and smoking), psychological factors (stress, anxiety, depression), medicines, hormones and lifestyle all contribute — often in combination.
Can erectile dysfunction be a sign of heart disease?
Yes. Because penile arteries are small, ED can appear years before other cardiovascular symptoms. New or worsening ED in a man under 50, or ED with chest pain on exertion, deserves proper assessment — not just a tablet.
At what age does ED become common?
ED becomes more common with age — around half of men over 40 report some degree — but it is not 'normal' at any age if it bothers you. Younger men often have a stronger psychological or lifestyle component, but physical causes still need excluding.
Is ED treatable?
Highly treatable in most men. Tablet treatments, lifestyle change, addressing underlying conditions, and talking therapies all help depending on cause. A confidential assessment takes minutes online at regulated UK clinics.
Is ED always psychological?
No. Circulation, nerves, hormones and medicines are common. Anxiety can add to it. Both can be true.
Can I drink grapefruit juice with ED tablets?
Some tablets interact with grapefruit. Follow the leaflet for whatever you were prescribed. We do not name those products in adverts.
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