So, swim at your own risk in these places-and keep an eye out for outbreak reports, she adds. Rare cases have also popped up in the northeastern US, Dr. What’s more, outbreaks of the rash caused by sea lice are reported often in the Caribbean, Mexico, Brazil, the Philippines, and Florida. 13 Common Causes Of Rashes On Your Buttįor instance, thimble jellyfish larvae are rushed into Florida waters and gulf streams in late spring through summer, according to the Florida Department of Health.But even just checking local ocean reports can keep you in the know about sea lice-and you can steer clear of the water if need be. Given that sea lice are basically invisible, it may seem like there’s nothing you can do to protect yourself (other than avoid the ocean!). There are some steps you can take to avoid a sea lice problem. But she recommends seeing a doctor if you do have symptoms like a fever and headache to make sure you’re not dealing with any other underlying health issue that could be behind your symptoms. Mild cases can be treated with over-the-counter hydrocortisone creams and antihistamine pills, Dr. In very rare cases, it can be accompanied by other symptoms like fever, nausea, diarrhea, or headache.ĭon’t fret: While it may be annoying, the rash isn’t usually dangerous. But some people may also develop a rash in places where friction occurs, like where your thighs rub.Ī seabather’s eruption rash typically sticks around for one to two weeks, according to Dr. Typically, you’ll see these bumps in areas that were covered by your bathing suit, where the jellyfish or sea anemone larvae were trapped. Arthur describes-and the reaction shows up as a bunch of itchy red bumps on your skin. The venom causes a “hypersensitivity reaction,” Dr. If you’ve been stung, you’ll know about 24 hours after you went swimming in the ocean. What’s the most common symptom of sea lice? Then, when you get out of the water and plop your tush down onto a beach towel, these critters react and sting you (and, really, who can blame them?). But these creatures are so small that they can get trapped inside your bathing suit, Dr. If you’re just swimming around them, you’ll likely be fine. Jellyfish and sea anemone both release venom when they feel threatened. “These organisms have been described to be the size of a speck of pepper and they’re translucent, making them impossible to avoid in the water,” says Allison Arthur, MD, a board-certified dermatologist in Orlando, Florida. The larval stages of thimble jellyfish and a type of sea anemone called Edwardsiella lineata are so tiny that people don’t even notice when they’re swimming in a pool of them.
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