Impotence, more commonly referred to as erectile dysfunction (ED), occurs when a man cannot hold an erection long enough to complete the sex act. Doctors at the Mayo Clinic report that while erectile dysfunction is common among older men, the condition can strike men of any age for a wide range of reasons.
Chronic Disease
Several chronic physical diseases can cause ED, including diabetes, heart disease and hypertension. Atherosclerosis, Parkinson's disease and multiple sclerosis are other chronic conditions that can cause impotence.
Illnesses
Temporary illnesses also can affect male performance. High blood pressure, hormonal disruptions and the aftermath of surgery or other traumatic physical events can cause impotence.
Lifestyle
Alcoholism and drug addiction are common causes of erectile dysfunction. Smoking, obesity and lack of exercise also can contribute to ED, say researchers at the National Kidney and Urologic Diseases Information Clearinghouse (NKUDIC).
Medication
Various medications can cause temporary impotence. Antidepressants, antihistamines, blood pressure medicine, tranquilizers and appetite suppressants can produce impotence as a side effect.
Psychological Causes
Psychological factors can play a large role in ED as well. Stress, anxiety, depression and fear of sexual failure produce close to 20 percent of the causes of ED, doctors at the NKUDIC report.
