Seabather's eruption is a rash that develops from the stings of jellyfish or sea anemone larvae. Although these rashes are annoying, they are not a serious medical problem. When an itchy rash occurs several days to weeks after a sting, the rash may mean a delayed skin reaction has occurred. A delayed reaction can occur many times over the course of 1 to 2 months following a sting.
You may have a fever, weakness, or joint stiffness or swelling. Medical treatment may ease the discomfort and prevent complications from a delayed reaction. Jellyfish or Portuguese man-of-war stings may cause blisters or small, shallow sores ulcers.
The skin at the site of the stings may look dusky or bluish purple. Healing may take many weeks. Permanent scars may occur at the site of a sting.
Sores usually heal without medical treatment. They move slowly through the water by pulsing the upper body. Also carried by ocean currents. Their tentacles can be 10 feet or longer. Other Names. Jellies or sea jellies. Large groups of jellies are called a bloom. Blooms can close beaches. Where They Live. Found in every ocean and coastline. Jellies have increased in numbers worldwide. Warmer ocean temps and pollution of ocean waters are factors.
Fishing the ocean too much is also a cause. Tuna, shark and swordfish eat jellies. Stings can occur while wading, swimming or diving in salt water. Honolulu gets over calls per month for stings. Beached Jellies. Even beached or dying jellies can sting.
So can pieces of tentacles floating in the water. They can release venom for up to 2 weeks. Vinegar is used to stop the venom in stingers. Caution: Do not use ammonia, urine, rubbing alcohol, fresh water or ice. A jellyfish sting is commonly described as being sharp, burning, prickling, or stinging.
Oftentimes, the sting will be accompanied by a throbbing pain that radiates upward and outward on the arm, leg, or torso. The duration and severity of a jellyfish sting can vary by species.
Stings from small bluebottle jellyfish may last for one hour. A sting from the Australian sea wasp Chironex fleckeri —described by some as the most lethal jellyfish in the world—can be deadly, especially in small children. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life.
Immunological and toxinological response to jellyfish stings. Inflamm Allergy Drug Targets. Boulware DR. A randomized, controlled field trial for the prevention of jellyfish stings with a topical sting inhibitor. J Travel Med. Cleveland Clinic. Jellyfish stings. Updated May 22, Not all jellyfish are equal: isotopic evidence for inter- and intraspecific variation in jellyfish trophic ecology. Delayed allergic reactions to jellyfish stings: usefulness of ultrasonographic evaluation: ultrasonographic features of delayed allergic reactions after jellyfish stings.
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Med J Aust. Heated debates: hot-water immersion or ice packs as first aid for Cnidarian envenomations? Toxins Basel. Allergy Asthma Clin Immunol. Evaluation of Cyanea capillata sting management protocols using ex vivo and in vitro envenomation models.
To pee, or not to pee: a review on envenomation and treatment in European jellyfish species. Mar Drugs. Pain from bluebottle jellyfish stings. J Paediatr Child Health. The pathology of Chironex fleckeri venom and known biological mechanisms. Toxicon X. Your Privacy Rights. To change or withdraw your consent choices for VerywellHealth.
At any time, you can update your settings through the "EU Privacy" link at the bottom of any page. These choices will be signaled globally to our partners and will not affect browsing data. We and our partners process data to: Actively scan device characteristics for identification. I Accept Show Purposes. Symptoms Jellyfish use their stings to subdue their prey.
Common Jellyfish stings are common with an estimated million incidences per year. The symptoms of a mild jellyfish sting may include: A stinging, prickling, or burning pain Red or purplish "track marks" along the route of contact with the tentacle Local itching and swelling Throbbing pain radiating up an arm or leg Rash occasionally Severe There is a lot still unknown about the causes of a severe reaction to jellyfish stings, in part because there are over 2, species of jellyfish around the world.
Symptoms of a severe jellyfish sting include: Numbness or tingling Shortness of breath Wheezing Chest pain Muscle cramps Hives Blistering skin Nausea or vomiting Difficulty swallowing Rapid heartbeat Heart palpations Dizziness or fainting Symptoms like these require immediate medical care.
Treatment Rapid treatment of jellyfish stings can reduce pain, keep systemic symptoms from getting worse, and lower the risk of complications including infections. First Aid There are three steps commonly recommended for first aid treatment of a jellyfish sting: Rinse : Rinse away the tentacles using hot water if possible. If hot water isn't available, use salt water rather than fresh.
Freshwater may worsen the pain. Remove tentacles : Peel off any remaining tentacles with a gloved hand or tweezers. Avoid using bare hands as you risk getting stung again. Take a hot bath : This can help extract some of the venom from the wound. The general rule is to bathe at the hottest possible temperature you can tolerate at least degrees F and up to degrees F.
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