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Not being able to get or keep an erection firm enough for sexual activity.

Erectile dysfunction can happen because of a physical condition, such as heart disease, obesity or diabetes. It also can happen because of anxiety, depression or stress. It can cause problems with self-esteem and relationships.

Symptoms can include trouble getting erect, trouble staying erect and wanting sex less.

The first step is to treat any conditions that could be causing the erectile dysfunction. If that doesn't help, medicines, a penis pump or a penis implant may work.