How effective is a blood test for erectile dysfunction?

Depending on your history, a clinician may check glucose, cholesterol, blood count, thyroid function or testosterone. These tests can point to diabetes, vascular risk, anaemia, thyroid problems or low testosterone that may affect erections. A hormone result needs context: timing, sleep, illness, medicines and repeat testing can influence interpretation.

Erectile dysfunction can also relate to blood flow, nerve function, medication effects, alcohol, stress, relationship concerns or pelvic conditions. Questions about erections during sleep or masturbation, sexual desire and the onset of symptoms often add information that a blood sample cannot provide.

Arrange a confidential appointment and bring a list of medicines, supplements and health conditions. Explain whether the change was sudden or gradual and whether desire or ejaculation has also changed. Do not use hormone products or online erectile-dysfunction medicines without medical advice. A clinician can decide which tests are relevant and discuss safe treatment options.

Seek prompt advice for erectile dysfunction with chest pain on exertion, breathlessness, new neurological symptoms, penile injury or painful curvature. Emergency care is needed for chest pain, sudden weakness on one side, severe genital injury or an erection that is painful and does not settle.

Ask which tests fit your symptoms, whether testosterone needs a morning repeat, if a medicine may contribute, and how blood pressure, glucose or cardiovascular health should be reviewed.