How Do You Know If A Jellyfish Sting Is Poisonous?

How Do You Know If A Jellyfish Sting Is Poisonous? Burning, prickling, stinging pain. Red, brown or purplish tracks on the skin — a “print” of the tentacles’ contact with your skin. Itching. Swelling. Throbbing pain that radiates up a leg or an arm. When should I be concerned about a jellyfish sting? A jellyfish