Treatments for Swimmer’s Itch

Swimmer’s itch may develop in response to certain parasites found in freshwater lakes and ponds. The medical term for this is also known as cercarial dermatitis. The parasites usually live on water wildlife, such as freshwater snails and ducks. When the water is calm and the day is hot and sunny, these parasites may be released into the water, and subsequently can burrow into the skin of swimmers. The parasites then die and the result is an itchy rash. The affected area may become red, itchy, and raised. Exposed areas of the skin while swimming are the most commonly affected areas.

Although the rash typically resolves in several days without treatment, the itching may be alleviated with over-the-counter medications or medications available with a prescription. Antihistamines available without a prescription, such as diphenhydramine (Benadryl) and cetirizine (Zyrtec), as well as anti-itch creams containing calamine lotion may be useful in providing itch relief.  Topical corticosteroid creams also may be applied to the affected area. For severe itching, prescription strength creams, such as fluocinonide (Lidex), may be prescribed. Nondrug treatment options include soaking in a bath of Epsom salts or oatmeal, or making a paste of baking soda and water to apply to the affected area.