Sea lice--more commonly referred to as seabather's eruption--is predominately caused by a hypersensitivity reaction to the larvae of sea anemone (Edwarsiella lineate) or thimble jelly fish (linuche unquiculata). Adults or children who swim in coastal waters may develop this condition if stung by the larvae of these ocean dwellers. Corticosteroid creams, oatmeal baths or calamine lotion may alleviate symptoms associated with sea lice.
Tingling or Itching
If you have been exposed to sea lice while swimming or wading in coastal waters, you may develop a number of skin-related symptoms. Certain people may experience a tingling sensation of the skin underneath the bathing suit, according to New Zealand Dermatological Society Incorporated. This tingling sensation is often first experienced while people are still in the water and can affect the groin, breasts or skin areas around the wetsuit cuffs. Over a few hours, the tingling sensation may evolve into an intense itching sensation that may last for several hours to weeks. If you experience a tingling or severe itching sensation while in coastal waters, get out of the water as soon as possible. Removing your bathing suit and washing off in seawater that does not contain these larvae may help prevent symptoms from worsening. The New Zealand Dermatological Society Incorporated notes that washing off with freshwater immediately following exposure to these larvae may actually worsen symptoms, as this may encourage the larvae to cling to your skin or clothing.
Rash
If you have been exposed to sea lice while wading or swimming in coastal waters, you may develop a rash on skin that's covered by your bathing suit, according to the Merck Manuals Online Medical Library. Sensations of tingling or itching typically appear first, with the rash developing within a few hours of exposure to the larvae, says the New York City Department of Health and Mental Hygiene. The rash may appear inflamed or irritated and may consist of small red bumps. If you develop any of these symptoms of sea lice exposure, remove your bathing suit as soon as possible to prevent additional larvae stings. Washing off with clean seawater may also help prevent the worsening of these symptoms.
Flu-like Symptoms
Certain people, especially children, may experience flu-like symptoms if stung by larvae while swimming or wading in coastal waters. Some people may experience nausea or additional symptoms, including fever or fatigue. Severe reactions to sea lice may require hospitalization to treat the allergic reaction. If you experience any of these flu-like symptoms following exposure to sea lice, speak with your physician for additional care.
