Small blisters (blisters) and itchy skin may be caused by papular urticaria, contact dermatitis, chickenpox and other diseases. 1. Pemphigus urticaria: Pemphigus urticaria is an allergic skin disease caused by insect bites, commonly found in exposed areas of the skin, lesions are characterized by sudden onset of edematous pimples, blisters on top of the lesions, accompanied by significant itching. 2. contact dermatitis: contact dermatitis is a disease caused by skin contact with external allergens and other substances, manifested as erythema, swelling, blisters, etc., and patients are often conscious of itching or burning pain. 3. chickenpox: chickenpox is chickenpox – herpes zoster virus infection caused by self-limiting, manifested as centripetal distribution of spots, papules, blisters, can be accompanied by pain, itching and other uncomfortable symptoms. Small blisters on the skin and itchy causes more, patients are advised to seek medical examination to clarify the diagnosis.