An inability to achieve or sustain an erection during sexual activity. Erectile dysfunction is a fairly common condition in men of all ages.

Men may have trouble developing and maintaining erections for a number of reasons. Stress, depression, and anxiety can cause erectile dysfunction, and physical conditions that restrict blood flow can also have an effect. Many medications can cause temporary erectile dysfunction. It is important to note that the ability to maintain an erection is not always related to sex drive.

There are a number of effective treatments for the condition, including pharmaceuticals such as sildenafil (Viagra), sexual therapy, physical therapy, and stress management therapy.