UF Health officials advise to have the following information ready when seeking medical help:
Person's age, weight and condition
Type of jellyfish, if possible
Time the person was stung
Location of the sting
As soon as possible, rinse the sting site with large amounts of household vinegar for at least 30 seconds. Vinegar is safe and effective for all types of jellyfish stings. Vinegar rapidly halts the thousands of tiny unfired stinging cells left on the surface of the skin after tentacle contact.
If vinegar is not available, the sting site can be washed with ocean water.
Protect the affected area and do not rub sand or apply any pressure to the area or scrape the sting site.
Soak the area in 107°F to 115°F (42°C to 45°C) standard tap hot water, (not scalding) for 20 to 40 minutes.
After soaking in hot water, apply antihistamine or steroid creams such as cortisone cream. This can help with pain and itching.