An erection did not work once. When is it worth checking?

The NHS says erection difficulties happen to many men from time to time. Stress, tiredness or drinking too much alcohol may play a part in an occasional episode. That does not mean you can name the cause from one night, and it does not say anything about your worth or your relationship.

You do not need to keep testing yourself the next day. If you want to understand what happened, quietly note whether you were exhausted, unwell, under unusual pressure or drinking. Then notice whether the difficulty returns. A pattern over time is more useful to discuss than trying to interpret every single encounter.

If it keeps happening, note when it began, whether it came on suddenly or gradually, and whether it happens every time or only sometimes. A clinician may ask about erections at other times, including in the morning; this is one part of a history, not a home test that proves the cause. Physical and emotional factors can overlap.

Bring a list of medicines, supplements and any known conditions. Diabetes, blood-vessel problems, some medicines, anxiety and depression can all contribute, according to NIDDK. That list is a reason to ask questions, not a way to diagnose yourself online. Do not stop a prescribed medicine because you suspect it may be involved; ask the prescriber first.

If the problem keeps happening, arrange a non-urgent conversation with a qualified clinician. The NHS recommends getting help because treatment is often possible and repeated difficulties can sometimes be linked to another health condition. You can begin simply: ‘This has happened several times. Can we talk about possible causes?’ A clinician can decide whether a medical history, examination or tests are useful for you.

Avoid buying an unverified ‘quick cure’ or borrowing someone else's medicine. Treatment depends on the cause and other medicines you take. Our private seven-question guide can help you put the pattern into words before that conversation; it cannot diagnose why it is happening. Needing help with a common health issue is not a personal failure.