Eating seafood at the seaside has no acne, and sleeping in a humid hotel has red acne. It itches. What happened?

If you are allergic to seafood, take some kairuitan or chlorpheniramine, which are sold in general pharmacies. It costs 2 or 3 yuan. Be careful not to touch the red and swollen places, and don't eat irritating food, seafood and the like. Really can't. Putting ice cubes in plastic bags can relieve itching and reduce swelling. I wish you a speedy recovery! ~