What are symptoms of jellyfish sting?
Some jellyfish have stingers that can pierce skin with venom. Symptoms include intense, stinging pain, rash, and wheals (raised welts). You then may get nausea, vomiting, diarrhea, lymph node swelling, pain in the belly and back, fever, chills, and sweating. Severe reactions can make it hard to breathe and can be deadly.
From: Wilderness: Jellyfish Sting WebMD Medical Reference
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