Concern over cases of swimmers’ itch in Saratoga Lake. Some resident say each time they go in the water, they emerge covered in rashes, reports the Daily Gazette. Swimmer’s itch is a rash that occurs when tiny parasites burrow into someone’s skin while swimming or wading in freshwater lakes and ponds but can happen in saltwater, too. Symptoms include an itchy rash that looks like pimples or blisters.