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Paraphimosis: foreskin stuck behind the head

If your foreskin is pulled back and won't go forward again, and the head of the penis is swelling, that's paraphimosis. It's a medical emergency.

Updated November 2026 · Written in plain language from public health sources · How we write

What to do right now

Go to an emergency room now, or call emergency services. Don't wait to see if it settles, and don't drive yourself. Ask someone to take you.

The swelling can cut off blood flow, so quick treatment matters. Doctors can usually reduce the swelling and move the foreskin back without surgery.

What it is

Paraphimosis happens when a tight foreskin is pulled back behind the head of the penis and gets stuck there. The tight ring squeezes the head, which swells, making it even harder to bring the foreskin forward.

Signs

  • The foreskin is behind the head and won't move forward
  • The head of the penis is swollen, and may look dark red or purple
  • Pain, which can be severe

How to prevent it

If your foreskin is tight, always return it to its normal forward position after cleaning, stretching, peeing, sex or a medical exam. Never force a tight foreskin back. If you're stretching at home, keep sessions gentle and finish every one by bringing the foreskin forward.

Sources

This article is for education only and isn't a substitute for advice from a doctor who can examine you.