How to Get Rid of Swimmer's Itch

Swimmer's itch, also known as cercarial dermatitis and duck itch, is a skin rash caused by an immune reaction to water-borne parasites released from snails that infect aquatic birds and mammals. Swimmer's itch develops when the larvae of the flatworm parasite schistosomatidae, called cercaria, mistakenly penetrate the swimmer's skin rather than an animal host. Because humans are not suitable hosts, the larvae die in the skin and do not infect humans. The rash is the result of a short-term inflammatory immune response. Symptoms include reddish pimples, small blisters and tingling, burning or itching. Most cases do not require medical attention.

Things You'll Need

• Isopropyl (rubbing) alcohol
• Corticosteroid cream
• Epson salts or baking soda
• Oatmeal bath
• Anti-itch lotion

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Instructions

• 1

  Rinse the affected area with isopropyl alcohol, then apply corticosteroid cream, a baking soda paste or an anti-itch lotion. To relieve pain, apply a cool compress or bathe in Epsom salts, baking soda or oatmeal.

• 2

  Do not scratch the affected area. Scratching may cause the rash to become infected. If itching is severe and home remedies provide no relief, contact your doctor for a prescription-strength lotion.

• 3

  Contact a dermatologist if symptoms persist longer than three days with no relief. Diagnosis of swimmer's itch is difficult because there is no blood test that detects the presence of cercaria. You will most likely be prescribed a lotion to relieve itching. For severe reactions, oral steroids may be prescribed.

• 4

  The adult parasite that causes swimmer's itch resides in the blood of aquatic birds and mammals.

  Prevent swimmer's itch by avoiding swimming in marshy areas where snails are found. Do not attract birds to areas where people are swimming. When finished swimming, towel-dry or shower immediately.