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Swimmer's Itch

Swimmer’s itch is an itchy skin rash that can develop after swimming in certain lakes, ponds or coastal waters. Small red bumps or blisters may appear on skin that was exposed to the water.

The rash is caused by an allergic reaction to microscopic parasites that normally infect birds or other animals. The parasites cannot develop into an infection in humans.

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AAP Guide to Swimmer's Itch

The AAP guide below explains what causes it, how to ease the itching and how to reduce the chance of getting it again.

AAP Symptom CheckerSwimmer's itch

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When to see a doctor

Contact your pediatrician or another healthcare professional if:

  • Itching is severe or the rash is not improving.
  • The skin becomes increasingly red, painful or drains pus.
  • Your child develops fever.
  • You are unsure whether the rash is swimmer’s itch.

Call 911 or get emergency care if:

  • Your child has a severe allergic reaction or another life-threatening emergency.

Talk to a nurse now, at any hour

When can my child be seen

Be seen today.

Every office keeps same-day appointments for illness and injury.

This evening or at the weekend.

Most offices run After Hours Care, by appointment rather than walk-in.

If you are worried, call. We would rather answer a question that turns out to be nothing.

More on bites and stings

See the rest of this group and all 164 symptoms