It's hot, and I have a pimple on my leg. I can scratch it and it will become a piece.

Consider urticaria; Urticaria, commonly known as wheal, rubella, papule and rash, is a common skin disease. Temporary inflammatory hyperemia and massive fluid exudation are caused by many factors. Causing local edema damage. It appears and quickly subsides, accompanied by severe itching.

Suggestion:

Papular urticaria is also called acute simple prurigo. Mostly caused by the bites of arthropods such as fleas, bedbugs, mites, midges and mosquitoes. In order to prevent this disease, we should improve environmental sanitation and living conditions and eliminate fleas, bedbugs, midges and mosquitoes. Children should avoid contact with animals such as cats and dogs. Topical use of various antipruritic drugs, oral chlorpheniramine and other antihistamines when necessary.