Erections can vary
An erection depends on several systems, including blood flow, nerves, hormones, psychological factors and context. Difficulty getting or maintaining an erection can happen occasionally and does not automatically mean there is a serious condition or a lack of attraction.
Possible contributors
Stress, anxiety, fatigue, alcohol, medicines, diabetes, cardiovascular conditions and other health factors may contribute. This list is not a diagnosis; the cause differs between individuals.
When to seek medical advice
Arrange a clinical review if the difficulty is persistent, recurrent, distressing or a new change. A clinician can assess possible underlying causes and discuss evidence-based options. Do not buy unverified enhancement products or combine medicines without professional advice.
Urgent symptoms
Seek emergency medical care for an erection lasting around four hours or longer, especially if painful, or for serious associated symptoms. Follow local emergency guidance.