Swimmer's Itch

(Cercarial dermatitis)

Swimmer's itch, also called cercarial dermatitis (sir-CARE-ee-uhl der-muh-TIGHT-iss), appears as a skin rash caused by an allergic reaction to specific parasites found in certain birds and mammals. Within minutes to days after swimming in contaminated water, skin may be tingling, burning, and itching. Most cases do not require medical attention.