Erectile dysfunction is when a man has difficulty getting an erection. Or keeping it long enough for sex. It’s also known as ED or impotence. It happens when not enough blood flows to the penis, preventing an erection.

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Erectile dysfunction (ED) is a common problem for many of us as we age, affecting 52% of us over 40. But it’s not just a condition of age, 25% of guys seeking treatment are under 40 years old.