Blister rises on the body, itch a bit next, how to do

Blisters on the body, accompanied by skin itching symptoms, may be caused by papular urticaria, may also be caused by chickenpox. Need to go to the hospital dermatology department for examination, treatment for the cause. If papular urticaria caused by oral loratadine, cetirizine and other antihistamine drugs, topical calamine lotion itching.