Most cases of itchy blisters on the hands are related to herpes sweat, hand eczema, tinea versicolor and other causes. 1. Sweat herpes: may be due to local skin allergies, ultraviolet radiation for a long time and other reasons caused by small blisters deep in the epidermis, and accompanied by varying degrees of itching, burning and other symptoms, often symmetrical in the hands or feet, will lead to itchy blisters on the hands of the symptoms. 2. hand eczema: in most cases is due to hand contact with stimuli in the external environment caused by local chronic, inflammatory, itchy skin disease, there will be erythema, pimples, blisters, itching and other symptoms in the hands, which will be manifested in the hands of the phenomenon of itchy blisters. 3. ringworm: is due to dermatophytes caused by localized superficial fungal infection of the skin on the hands, often blisters, dryness, flaking and other symptoms, when the secretion of excessive inflammatory factors to stimulate the skin tissue, the phenomenon of itching, which can be manifested as itchy blisters on the hands of the symptoms. Causes of blisters on the hands of itchy causes more, it is recommended to go to the hospital in time for examination, a clear diagnosis, early formal treatment.