![]() ![]() Some children also develop a tummy upset. Up to 20% of patients complain of feeling slightly unwell, with fever and fatigue. It is generally confined under the swimming costume, particularly the tight-fitting areas, but can extend to exposed skin. Over several hours it becomes an itch, which can last for several weeks. What are the clinical features of sea bather's eruption?Ī tingling sensation under the bathing suit (breasts, groin, cuffs of wetsuits) may be first noticed while still in the water or soon after emerging. This is further supported by only a small proportion of people exposed develop the rash. A number of studies have shown high antibody levels to the jellyfish antigens, suggesting the reaction is an allergic response. The initial stinging feeling is probably due to the toxin, however the subsequent rash is likely to be immune-mediated. Wearing bathing suits for prolonged periods after swimming, showering in fresh water, and mechanical stimulation (rubbing with a towel) make the eruption worse. Pressure on the small jellyfish cause the stinging cells to discharge, releasing toxin into the skin. As the swimmer gets out of the sea, water drains out of the bathing suit, trapping the organisms between the suit and the skin. The rash typically develops underneath the bathing costume, which is believed to trap the jellyfish organisms against the skin. Each individual is equipped with a number of stinging cells, that can be triggered by simple mechanical pressure or by osmotic changes that occur with evaporation or when rinsing off with freshwater. The tiny animals become trapped underneath bathing suits or in the hair of the bather. It affects swimmers, snorkelers, or divers soon after getting out of the water. Most cases of sea bather's eruption occur during the summer as it seems to be dependant on water temperature. Sea thimbles are small tropical jellyfish that, even as adults, get no larger than about a centimetre in size. It is likely sea bather's eruption is due to different marine creatures in other parts of the world. It has also been reported in the Long Island area of New York State due to the larval stage of the sea anemone, Edwardsiella lineata. Learn more from the Centers of Disease Control and Prevention.Most studies have been from the east coast of North and Central America where sea bather's eruption is a reaction to toxins released by all three free-swimming stages (ephyrae, medusae, and larvae) of the thimble jellyfish, Linuche unguiculata. If itching is severe, contact a health care provider, who might suggest prescription strength lotions or creams. Scratching affected areas can cause a bacterial infection. Over-the-counter and home remedies such as anti-itch and corticosteroid creams, cool compresses, Epsom salts, baking soda and colloidal oatmeal baths can help to soothe symptoms. Most cases of swimmer’s itch get better on their own. Swimmer’s itch is not contagious it cannot be passed from person to person. Children are more likely to get swimmer’s itch than adults because kids spend more time in shallow waters where the parasite may be present ,and are less likely to towel dry. Help spread the word in your community by reporting symptoms of swimmer’s itch to your local health departmentĪnyone can get swimmer’s itch.Rinse off and towel dry at the end of the day. ![]()
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