Erectile Dysfunction (impotence) The inability to get and maintain an erection.
Having erection trouble from time to time isn't necessarily a cause for concern. If erectile dysfunction is an ongoing issue, however, it can cause stress, affect your self-confidence and contribute to relationship problems. Problems getting or keeping an erection can also be a sign of an underlying health condition that needs treatment and a risk factor for heart disease.
If you're concerned about erectile dysfunction, talk to your doctor. Don't be embarrassed. Sometimes, treating an underlying condition is enough to reverse erectile dysfunction. In other cases, medications or other direct treatments might be needed.
Erectile dysfunction symptoms might include persistent:
A family doctor is a good place to start when you have erectile problems. See your doctor if:
ED is often a symptom of another health problem or health-related factor.
Here is what the Mayo Clinic has to say about Erectile dysfunction. Also, The National institute of diabetes and digestive and kidney diseases