How to Treat a Portuguese Man O' War Sting (Bluebottle Sting)

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If you’ve been stung by a Portugese Man o’ War (also called a bluebottle), there’s no need to panic: bluebottle stings are very rarely deadly. [1] This marine animal that’s known for its intensely blue hue can sting you while you’re swimming in the ocean or walking around on the beach. Their stings are one of the most painful and intense of all jellyfish-like creatures, so it’s important to start treating the symptoms right away to lower your pain and discomfort levels. If you’re having severe symptoms, like chest pains or shortness of breath, call for emergency services. [2]

Question 1 of 5:

Symptoms

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    Bluebottle stings are often classified as one of the most painful stings from any jellyfish or siphonophore. Thankfully, the pain usually fades within an hour, but it may ebb and flow until then. [3]
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    The mark left by the sting often looks like a string of beads underneath your skin. It might be swollen and itchy, and it may hurt to the touch, but the mark usually fades within 1 to 2 days. [4]
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    These will probably be most intense right after you get stung. The symptoms usually fade within hours or a few days, especially if the sting was mild. [5]
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    These symptoms often happen if the sting is severe. You may also experience sweating, faintness, or dizziness. The severity of your symptoms depends on your age, how long you were exposed to the stinger, and how much of your skin is affected. [6]
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Question 2 of 5:

Treatment

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    Saltwater will deactivate the stingers and stop them from injecting more venom into your skin, so do this right away for some relief. Then, put on thick rubber or leather gloves and gently peel the stingers off of your skin. Try to do this as soon as you possibly can to lower your pain levels.
    • It’s very important to put gloves on before removing the stingers. If you don’t, you could sting yourself again.
    • If you’re having trouble removing the stingers by hand, use tweezers instead.
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    This will help soothe your skin and reduce pain, swelling, and inflammation. Make sure the water is between 110 and 113 °F (43 and 45 °C) so it feels hot but not scalding. [7]
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    Wrap an ice pack or a bag of ice in a towel and press it against the affected area for 20 minutes at a time. You can do this 3 to 4 times per day for the next few days to reduce the pain and swelling.
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    Medication containing diphenhydramine can help reduce itching, swelling, and pain. You can find these medications over-the-counter at most drug stores and pharmacies.
    • If you have glaucoma or prostate issues, talk to a doctor before taking antihistamines.
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    If you experience cramps, fever, weakness, vomiting, or diarrhea, you might need medical treatment. Severe reactions like these can indicate an allergic reaction, so it’s important to get help as soon as possible.
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    These common at-home remedies are often recommended for washing jellyfish and siphonophore stings; however, studies have shown that vinegar, urine, baking soda, and shaving cream can actually intensify your pain levels. [8]
    • You should also stay away from rinsing with alcohol or ethanol, since those can make your pain worse.
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Question 3 of 5:

What to Expect if You Get Stung

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    Keep practicing at-home care, like using ice packs and taking oral antihistamines. The pain and swelling will most likely go down after a few hours or a few days.
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    This is especially true if your sting was severe. If you have a rash that lasts for more than 6 weeks, talk to your doctor.
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Question 4 of 5:

More Information on Man O' Wars

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    Siphonophores work together in colonies to swim, eat, and reproduce. This means that when you see one bluebottle, you’re most likely going to see a group of them not far behind. [9]
    • Siphonophores are closely related to jellyfish, which is why they look so similar.
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    The sac floats up to the water’s surface, so you can spot a bluebottle when they’re in the water. When they’re washed up on shore, bluebottles often look bright and iridescent. [10]
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    They’ll often float in groups of 1,000 or more in the Indian and Pacific Oceans. Bluebottle stings are very common during the summer in Australia, since strong winds carry them to the shore of sandy beaches. [11]
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    If you brush up against it in the water, you’ll feel the pain almost immediately. Touching the top of a bluebottle is okay, as long as you stay away from the tentacles on the bottom. [12]
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Question 5 of 5:

Prevention

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    If the report says that bluebottles are in the area, try to avoid it until further notice. Remember: they’re most common in the summer and during strong tides.
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    They can sting you even if they’ve been dead for weeks! Watch where you’re walking on the beach, and give washed-up jellyfish and siphonophores a wide berth. [13]
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      Warnings

      • If you experience loss of consciousness, shortness of breath, or chest pain, call emergency services right away.
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      References

      1. ↑ https://oceanservice.noaa.gov/facts/portuguese-man-o-war.html
      2. ↑ https://www.mayoclinic.org/diseases-conditions/jellyfish-stings/diagnosis-treatment/drc-20353290
      3. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773479/
      4. ↑ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3773479/
      5. ↑ https://www.healthdirect.gov.au/jellyfish-stings
      6. ↑ https://www.mayoclinic.org/diseases-conditions/jellyfish-stings/symptoms-causes/syc-20353284
      7. ↑ https://www.healthdirect.gov.au/jellyfish-stings
      8. ↑ https://www.mdpi.com/2072-6651/9/5/149/htm
      9. ↑ https://oceana.org/marine-life/corals-and-other-invertebrates/bluebottle
      1. ↑ https://oceana.org/marine-life/corals-and-other-invertebrates/bluebottle
      2. ↑ https://oceana.org/marine-life/corals-and-other-invertebrates/bluebottle
      3. ↑ https://www.mayoclinic.org/diseases-conditions/jellyfish-stings/symptoms-causes/syc-20353284
      4. ↑ https://oceanservice.noaa.gov/facts/portuguese-man-o-war.html
      5. ↑ https://oceanservice.noaa.gov/facts/portuguese-man-o-war.html

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      • Emma Corrigan

        Sep 15, 2021

        "Hubby stung by a man o war (blue bottle). I knew from your article not to treat as a jellyfish sting, so thank you."
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