Our Symptom checker provides clinical advice on what to do next based on your symptoms.
A prolonged erection occurs when blood in the penis becomes trapped and cannot circulate. This condition can be painful and can sometimes be caused by medicines used to treat erectile dysfunction. Learn more about prolonged erection here.
Sickle cell anaemia
Sickle cell anaemia is the most common and most serious form of sickle cell disease, in which the body produces too much red blood cells that are unstable.