Another treatment that is sometimes helpful with jellyfish and insect stings. Get some monosodium glutamate, commonly sold as "Accent" in the foodstores. Make a paste and rub it on the affected area.
Hello,
Jellyfish stings cause immediate, intense pain and burning that can last for several hours. Raised, red welts develop along the site of the sting, which may look as if you have been hit with a whip. The welts may last for 1 to 2 weeks, and itchy skin rashes may appear 1 to 4 weeks after the sting. Fortunately, most jellyfish stings are not severe.
Treatment of jelly fish stings include immediate application of vinegar and hot water or salt water which you have already done. For pain, take acetaminophen (Tylenol) or Ibuprofen (Motrin) or Aleve every 8 hours for pain.Also take healthy nutritious diet.
If associated with any difficulty in breathing or wheezing or severity in symptoms,pls consult ER for treatment as it can be life threatening anaphylaxis.
Hope it helps. Take care and pls do keep me posted on how you are doing.