Itchy clear blisters on the skin may be caused by conditions such as papular urticaria, sweat blisters and chickenpox. 1. papular urticaria: allergic skin disease due to insect bites, manifested as windswept pimples with small blisters at the top and intense itching. It can be treated with topical glycerine lotion, glucocorticoid ointment such as hydrocortisone cream and antihistamine drugs such as oral loratadine. 2. Sweat herpes: a special manifestation of eczema, more blisters appear on the hands, accompanied by intense itching, mostly symmetrical distribution. It can be treated with glucocorticoid creams such as hydrocortisone cream and antihistamine drugs such as oral loratadine. 3. Chickenpox: caused by varicella-zoster virus infection, the initial rash is a red patchy rash or papule, which gradually turns into blisters. The disease requires isolation and is self-limiting, with antiviral and symptomatic treatment as the mainstay. There are more causes of clear blisters on the skin, you should go to the hospital in time, after clarifying the cause of the disease, standardized treatment under the guidance of the doctor.