Swimmer’s itch suspected at Valkjärvi beach in Kärkölä

Swimmer’s itch, a skin irritation caused by parasitic flatworm larvae found in waterfowl, may be affecting bathers at Valkjärvi beach in Kärkölä, Päijät-Häme, according to local environmental health authorities.

Nelly Loukiala, an environmental health engineer, told Yle that a visitor to the beach reported symptoms such as rashes and itching after swimming, which typically indicate swimmer’s itch.

The condition is not dangerous but can be uncomfortable. Symptoms usually resolve on their own within a few days or up to two weeks. Over-the-counter antihistamines and hydrocortisone creams can help alleviate the irritation, said Mikaela Mutru, an infectious disease specialist at the Finnish Institute for Health and Welfare. Those with heightened sensitivity may experience more severe reactions.

Swimmer’s itch is more common in shallow, vegetated waters with waterfowl and snail populations, as both are required for the parasite’s life cycle. Warm weather increases the risk.

Authorities have posted notices at the beach and are monitoring the situation but have not introduced further measures. To reduce the risk, bathers are advised to shower and thoroughly dry their skin after swimming. If showering is not possible, Loukiala recommends drying the skin vigorously with a rough towel.