Small itchy blisters on the hands may be caused by herpes sweat, tinea cruris, eczema and other diseases, or may be caused by other diseases such as contact dermatitis. 1. Sweat herpes: the cause of sweat herpes is not yet clear, may be caused by a variety of factors, such as local allergies, sweat stimulation and so on. Patients will have blisters, tingling, itching, etc. on the hands, and a burning sensation will also occur. 2. Ringworm: ringworm is mainly caused by dermatophyte infection, and the main symptoms of patients are small blisters, itching, flaking, dryness and so on. In addition, patients with tinea cruris may also have symptoms such as thickened keratinization and ring-shaped patches. 3. Eczema: the etiology and pathogenesis of eczema is not clear, mostly due to internal and external factors. Patients will have symptoms such as corn-sized papules, blisters, erythema, edema, etc., as well as symptoms such as itching, vesiculation and flaking. 4. Other: contact dermatitis, stumptown pustulosis and other diseases can also lead to the phenomenon of itchy hand blisters. When the patient has the symptom of itchy hand blisters, he should consult a doctor in time and follow the doctor’s instructions for treatment.