Shortly after being stung, a swimmer may complain of skin discomfort. The rash develops in a few minutes to 12 hours after swimming. The rash consists of raised, hard or soft bumps, or blisters of different shapes and sizes that appear very red and may be extremely itchy. The larvae can become trapped in the fabric of a swimsuit, under swim caps and fins, and along the cuff edges of wet suits and T-shirts. The rash often appears in areas of the body that were covered.
Thimble jellyfish and Sea anemone are usually the offenders. While sea lice normally goes away within two weeks without medical treatment, there are suggestions for how parents can treat their children at home. To see the recommendations, read more