Jellyfish and sea
For many people, summer is associated with the sea, tan, but these pleasant moments may be ruined by jellyfish. Swimming is common during swimming or diving in the sea.
Jellyfish stings vary greatly in severity. Most often they result in immediate pain and red, irritated marks on the skin. Some jellyfish stings may cause more whole-body (systemic) illness. And in rare cases jellyfish stings are life-threatening.
Most jellyfish stings get better with home treatment. Severe reactions require emergency medical care.
Symptoms
Common signs and symptoms of jellyfish stings include:
- 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
Signs and symptoms of severe jellyfish stings include:
- Stomach pain, nausea, and vomiting
- Headache
- Muscle pain or spasms
- Weakness, drowsiness
- Fainting and confusion
- Difficulty breathing
- Heart problems
Source:
https://www.mayoclinic.org/diseases-conditions/jellyfish-stings/symptoms-
causes/syc-20353284