Slide show: Poison ivy and other summer skin irritants
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Swimmer's itch is an itchy rash caused by certain parasites that normally live on waterfowl and freshwater snails. On warm, sunny days — especially in calm freshwater lakes or ponds — these parasites can be released into the water. While you swim, the parasites might burrow into your skin. The parasites soon die — and you're left with itchy, red, raised spots on your skin.

Swimmer's itch is usually mild and resolves on its own within a week. In the meantime, control itching with an over-the-counter anti-itch cream, such as hydrocortisone cream. However, if initial itching is severe, scratching can cause abrasions and skin infections. Consult your doctor if symptoms persist longer than three days.

See more Multimedia July 15, 2014