Men's Health Library
Erectile dysfunction: what it is, what causes it, and when to talk to a doctor
Difficulty getting or keeping an erection is one of the most common health concerns men raise with their doctors — and one of the least often raised early. This overview explains the basics in plain language.
Erectile dysfunction (ED) describes ongoing difficulty getting or maintaining an erection firm enough for sexual activity. The key word is ongoing. Occasional difficulty is common and usually not a sign of anything wrong — tiredness, stress, alcohol and illness can all cause it temporarily. Doctors generally become interested when the problem persists over weeks or months, or when it appears alongside other changes in health.
How common is it?
ED becomes more common with age, but it is not limited to older men and it is not an unavoidable part of ageing. Population studies consistently find that a substantial minority of men over 40 experience it to some degree, with prevalence rising in each subsequent decade. Many men never mention it to a clinician, which means the condition is generally thought to be under-reported rather than over-reported.
Why doctors take it seriously
Erections depend on healthy blood flow, healthy nerves, and normal hormone signalling. Because of this, persistent ED is sometimes the first noticeable sign of a broader circulatory or metabolic issue — which is the main reason clinicians encourage men not to wait it out silently.
Common contributing factors
In most cases more than one factor is involved, and physical and psychological causes frequently overlap.
| Category | Examples commonly discussed by clinicians |
|---|---|
| Circulatory | High blood pressure, high cholesterol, atherosclerosis, heart disease |
| Metabolic | Type 2 diabetes, obesity, metabolic syndrome |
| Neurological | Nerve injury, spinal cord conditions, multiple sclerosis, prostate surgery |
| Hormonal | Low testosterone, thyroid disorders, other endocrine conditions |
| Psychological | Stress, anxiety (including performance anxiety), depression, relationship strain |
| Lifestyle | Smoking, heavy alcohol use, sedentary routine, poor sleep |
| Medication | Some blood pressure drugs, antidepressants, and others — never stop a prescribed medicine without medical advice |
When to make an appointment
It is reasonable to speak to a doctor if any of the following apply:
- The difficulty has continued for several weeks or longer.
- It began suddenly, or after starting a new medication.
- You also have symptoms such as chest pain, breathlessness, unusual fatigue, or reduced sensation.
- You have diabetes, high blood pressure, high cholesterol, or a family history of heart disease.
- It is causing you distress, or affecting your relationship or mood.
What an appointment usually involves
Most first appointments are a conversation rather than an examination. A clinician will typically ask about how long the problem has been present, whether it happens in all situations, your general health, your medications, and your mood and stress levels. Simple blood tests — for glucose, cholesterol, and sometimes hormone levels — are common next steps.
Questions worth preparing
- Could any of my current medications be contributing?
- Should I be screened for diabetes, blood pressure or cholesterol issues?
- Are there lifestyle changes you would prioritise in my case?
- What would you consider a reasonable next step if this does not improve?
Lifestyle factors associated with vascular health
Research into cardiovascular health consistently associates a number of everyday habits with better circulatory function generally. These are not treatments for any condition, and their effect varies from person to person, but they are commonly discussed in a primary-care setting:
- Not smoking, and reducing alcohol intake.
- Regular physical activity, particularly activity that raises the heart rate.
- Maintaining a weight your clinician considers healthy for you.
- Managing blood pressure, blood sugar and cholesterol with medical guidance.
- Prioritising sleep, and addressing sustained stress or low mood.
A note on information you find online
Men's health is a topic with a great deal of marketing attached to it. When reading about any approach, it is worth checking whether claims are specific and evidence-based, who is making them, and whether the source has something to sell. Reliable general starting points include national health services and large academic medical centres, such as the National Institute of Diabetes and Digestive and Kidney Diseases and the Mayo Clinic.