Bather’s eruption


Bather’s eruption: An intensely itchy rash due to contact with the tiny thimble jellyfish (Linuche unguiculata).

These jellyfish are common between March and August in the waters off of Florida and in the Gulf of Mexico and the Caribbean Sea. There may be no adult jellyfish around as a warning. The jellyfish larvae look like mere specks of “finely ground pepper” and can evoke the same response.

The reaction tends to start 4-24 hours after exposure to the jellyfish. People who have had previous exposure to seabather’s rash may have an immediate stinging sensation. Some people feel like they have the flu with nausea, vomiting, headache, muscle and joint aches, and malaise.

A bathing suit traps the jellyfish larvae with the fabric acting like a net. The best way to prevent stings is clearly to stay out of the water. Anyone who has had a previous episode of seabather’s itch is advised to not go in the water. If one goes in the water, one can wear clothes such as a wet suit that provide a protective barrier. Careful washing of swimwear after taking a dip is advisable. Wearing a T-shirt into the water is a poor idea because it increases the risk of a severe reaction. Topical anti-itch creams are only temporarily effective.

Other names for this disorder include seabather’s itch, sea poisoning, ocean itch and seabather’s itch and the jellyfish are sometimes called sea critters or, incorrectly, sea lice.

Read Also:

  • Batten disease

    Batten disease: a rare, fatal genetic condition that typically begins in childhood. It is a form of a group of neurologic disorders called the neuronal ceroid lipofuscinoses, or NCLs. The term Batten disease is sometimes used to refer to all the NCL disorders. Early signs can be vision changes, seizures, clumsiness, or behavior changes. With […]

  • Bathophobia

    Bathophobia: An abnormal and persistent fear of depths. Sufferers from bathophobia experience anxiety even though they realize they are safe from falling into or being consumed by depths. The feared object may be a long, dark hallway, a well or a deep pool or lake. “Bathophobia” is derived from the Greek “bathos” (depth) and “phobos” […]

  • Battered child syndrome

    Battered child syndrome: A disease in which children are physically abused. The battered child syndrome is a form of child abuse. Not until the 19th century were children granted the same legal status as domesticated animals in regard to protection against cruelty and/or neglect. In 1962 the term “battered child syndrome” entered medicine. By 1976 […]

  • Battle fatigue

    The World War II name for what is known today as post-traumatic stress, this is a psychological disorder that develops in some individuals who have had major traumatic experiences (and, for example, have been in a serious accident or through a war). The person is typically numb at first but later has symptoms including depression, […]

  • Bayes theorem

    Bayes theorem: A probability principle set forth by the English mathematician Thomas Bayes (1702-1761). Bayes’ theorem is of value in medical decision-making and some of the biomedical sciences. Bayes’ theorem is employed in clinical epidemiology to determine the probability of a particular disease in a group of people with a specific characteristic on the basis […]


Disclaimer: Bather's eruption definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.