Pain is best managed with vinegar
Steroid cream and<unk>  antihistamines can be used for mild urticaria.
If severe,<unk>  steroids may be warranted.
Fire coral envenomation
Toxins
Crown-of-Thorns starfish envenomation
Ciguatera
Stonefish envenomation
Scombroid
Box jellyfish envenomation
Tetrodotoxin 