This is SeaTalk: Ocean News from the University of Delaware.

Swimmer’s itch can really take the fun out of a summer vacation. Also known as clam digger’s itch, the uncomfortable rash is an allergic reaction to a tiny free-swimming parasite sometimes found naturally in shallow coastal waters. The parasite is usually found in birds and aquatic snails. Although it isn’t harmful to humans, it can irritate skin, causing a red bumpy rash and intense itching that can last as long as a week. You can take measures to prevent swimmer’s itch by avoiding water in areas where there are posted warnings, and drying off with a towel or rinsing well with fresh water immediately after wading or swimming. This is SeaTalk, a public service announcement from the University of Delaware, the Delaware Sea Grant College Program, and this station.