Itchy bumps on the body have the following conditions: 1, cholinergic urticaria: cholinergic urticaria is related to emotional excitement, strenuous activity, hot environment and other factors. 2, eczema: eczema has a variety of causes, which may be food substances, inhalation substances or contact substances, contact substances such as cement, suggesting the presence of allergies. 3, viral infectious diseases: pruritic diseases in some Viral infectious diseases can also occur, such as rubella, measles, etc. may be accompanied by itching. Drug allergy occurs mostly in about 20 days of medication, so the retroactive medication should be longer and the suspected allergenic drug needs to be avoided for the rash to gradually subside.