Erectile dysfunction (ED) is more common than you think, affecting about 30 million men in the United States.

ED is the inability to get and keep an erection firm enough to have sex.

In terms of complete erectile dysfunction, 5 percent of men at 40 years and 15 percent at 70 years old are affected.

Let’s discuss five causes of ED, you should consider:

An erection can only occur when the blood vessels in the penis enlarge and fill with blood.

Uncontrolled diabetes has been associated with low testosterone levels as well as damage to the nerves and blood vessels that supply the penis.