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Understanding ED

Start here if you are new to the subject: what ED is, how an erection works in plain language, and which signs are worth a conversation with a clinician.

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Erectile dysfunction: what it is, what causes it, and what helps

Erectile dysfunction explained plainly: what ED means, how common it is, its causes, how it is diagnosed, treatments, prevention and fertility.

Is it ED?

How it works

Questions this section answers

All questions
  • Causes and Conditions

    What can cause ED and what it can signal about your health: heart, diabetes, nerves, hormones, sleep and the medicines that affect erections.

  • Age and Life Stage

    How common ED is at each age, what tends to drive it in your 20s through your 60s and beyond, and why age alone is not the cause.

  • Getting Care

    When to see a doctor about ED, what the visit and tests involve, how online care works, and what treatment costs.