From the Research
The treatment for Sea Bather's Eruption primarily involves relieving symptoms until the rash resolves on its own, with the most recent and highest quality study 1 suggesting that symptomatic treatment is the mainstay of therapy for this self-limited rash. To manage the condition, start by rinsing the affected skin with fresh water and removing any swimwear that may contain trapped organisms.
- Apply over-the-counter 1% hydrocortisone cream to the rash 2-3 times daily to reduce inflammation and itching, as suggested by previous studies 2, 3, 4, 5.
- For more severe itching, take an oral antihistamine like diphenhydramine (Benadryl) 25-50mg every 4-6 hours or non-sedating options like cetirizine (Zyrtec) 10mg daily or loratadine (Claritin) 10mg daily.
- Calamine lotion can provide additional itch relief when applied to affected areas.
- For pain and inflammation, consider ibuprofen (Advil) 400-600mg every 6 hours or acetaminophen (Tylenol) 500-1000mg every 6 hours.
- Cool compresses or colloidal oatmeal baths can also soothe irritated skin. Most cases resolve within 1-2 weeks without complications, as reported in the study 1. The rash occurs when microscopic jellyfish larvae (thimble jellyfish or sea lice) become trapped between skin and swimwear, releasing toxins that cause an allergic reaction. If symptoms are severe or include fever, chills, headache, or widespread rash, seek medical attention as oral steroids may be necessary, as suggested by the study 2.