Erectile dysfunction (ED) affects as many as 30 million men in the United States. Almost half of men over age 75 experience ED, according to the National Institutes of Health. ED is commonly called impotence. It is a condition in which a man can not achieve or maintain an erection during sexual performance. Symptoms may also include reduced sexual desire or libido. These kinds of issues can happen at any time and to any man. Causes mainly include: fatigue, stress, relationship issues, performance anxiety, alcohol consumption Erectile dysfunction symptoms might include persistent: Trouble getting an erection, Trouble keeping an erection, Reduced sexual desire.