Erectile Dysfunction
A stigma-free guide to understanding ED — what causes it, how it's treated, and where to get help.
What is erectile dysfunction?
Erectile dysfunction (ED) is the persistent inability to achieve or maintain an erection firm enough for satisfactory sexual activity. Almost all men experience occasional difficulty with erections — this is entirely normal and usually not cause for concern. ED is typically only considered a medical issue if the problem is frequent or ongoing.
ED is extremely common. Research suggests it affects around 52% of men between the ages of 40 and 70 to some degree — ranging from mild to complete. Prevalence increases with age, but ED is not an inevitable part of ageing and is treatable at any age.
Despite its prevalence, ED is chronically under-reported and under-treated because many men feel too embarrassed to raise it with a doctor. This guide is here to provide clear, honest information and direct you to the right support.
Common causes of ED
ED has a wide range of physical and psychological causes. Most cases in men over 40 have a predominantly physical cause; in younger men, psychological factors are more common. Often it's a mix of both.
❤️ Physical — Cardiovascular
High blood pressure (hypertension)
Damages blood vessels, reducing blood flow to the penis needed for an erection.
High cholesterol / atherosclerosis
Narrowing of the arteries (atherosclerosis) is one of the most common physical causes of ED.
Heart disease
ED is often an early warning sign of cardiovascular disease — men with ED have a significantly higher risk of heart attack within 5 years.
🧬 Physical — Hormonal & Metabolic
Diabetes
Both type 1 and type 2 diabetes damage nerves and blood vessels. Up to 50% of men with diabetes experience ED.
Low testosterone (hypogonadism)
Testosterone plays a key role in sexual arousal. Levels naturally decline with age but can drop prematurely.
Obesity
Excess weight is strongly linked to ED through its effects on hormones, blood pressure, and vascular health.
Thyroid disorders
Both an underactive and overactive thyroid can affect sexual function and libido.
🧠 Physical — Neurological
Multiple sclerosis (MS)
Nerve damage caused by MS frequently leads to sexual dysfunction in men.
Parkinson's disease
Affects nerve signals involved in the erectile process.
Spinal cord injury
Depending on the location and severity of the injury, erections may be partially or fully affected.
Stroke
Neurological damage from stroke can disrupt the pathways involved in achieving an erection.
💊 Physical — Lifestyle & Medications
Smoking
Damages the blood vessels that supply the penis. Men who smoke are twice as likely to have ED.
Excessive alcohol
Chronic heavy drinking depresses the nervous system and reduces testosterone levels.
Recreational drugs
Cocaine, cannabis, opioids, and anabolic steroids are all associated with ED.
Certain medications
Antidepressants (SSRIs), beta-blockers, diuretics, and some antipsychotics can all cause or worsen ED as a side effect. Never stop prescribed medication without speaking to a doctor.
Peyronie's disease
Scar tissue inside the penis causes curved, painful erections and can interfere with the ability to maintain an erection.
💬 Psychological
Performance anxiety
Fear of not performing sexually — often triggered by one or two episodes of ED — creates a self-reinforcing cycle.
Depression
Both the condition itself and the medications used to treat it can cause ED. Depression reduces libido and disrupts the nervous system.
Anxiety & stress
Chronic stress triggers cortisol release, which suppresses testosterone and narrows blood vessels.
Relationship difficulties
Conflict, lack of communication, or unresolved emotional issues with a partner commonly contribute to ED.
Past trauma
Sexual abuse or other trauma can create deeply embedded psychological barriers to sexual function.
Treatment options
The good news is that ED is almost always treatable. The right treatment depends on the underlying cause and may involve one or a combination of approaches.
Talk to your GP first
ED is one of the most common reasons men visit a GP or urologist. A doctor can identify any underlying physical causes, carry out blood tests (checking testosterone, blood sugar, cholesterol), and discuss options. There is absolutely no need to feel embarrassed.
PDE5 inhibitors (Sildenafil / Tadalafil)
Medications such as Viagra (sildenafil) and Cialis (tadalafil) are first-line treatments for most men with ED. They work by increasing blood flow to the penis. They are safe, effective, and available on prescription or from regulated pharmacies — you do not need to buy them from unregulated sources.
Lifestyle changes
Regular aerobic exercise (even 30 minutes of brisk walking per day) has been shown to significantly improve ED. Quitting smoking, reducing alcohol, losing excess weight, and managing blood pressure all have a substantial positive impact.
Psychological therapy (CBT / sex therapy)
Where ED has a significant psychological component, cognitive behavioural therapy (CBT), psychosexual counselling, or couples therapy is often highly effective — sometimes more so than medication.
Hormone therapy
If low testosterone is identified as a contributing factor, testosterone replacement therapy (TRT) may be considered. This should only be initiated after a blood test confirming low levels and is managed by a specialist.
Vacuum pumps, injections & implants
For men who do not respond to medication, vacuum erection devices, penile injections (alprostadil), or surgically implanted penile prostheses are well-established options managed by specialists.
Trusted resources
The following links go directly to guidance from the NHS, the US National Institutes of Health (NIH / MedlinePlus), and WebMD — three of the world's most trusted medical information sources.
🩺 When to see a doctor
You should see a GP or healthcare provider if:
- • ED is happening frequently or consistently
- • You also have symptoms of heart disease, diabetes, or hormonal problems
- • ED is affecting your mental health, self-esteem, or relationship
- • You are considering buying medication online without a prescription — counterfeit ED drugs are dangerous
GPs discuss ED regularly and there is no need for embarrassment. The consultation is confidential and the doctor is there to help, not to judge.
Related pages
This page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional for diagnosis and treatment.