Blisters are generally referred to as blisters, and blisters on legs that are still itchy may be caused by ringworm, eczema, contact dermatitis and so on. 1. Ringworm: ringworm is caused by red trichophyton, white pseudomycelium and other fungi invading the skin. Patients may have pimples, papules, erythema, blisters, itching and other manifestations on the inner thighs, groin, perineum and other parts of the body. Therefore, patients with itchy blisters on the legs, mostly considered to be due to ringworm. 2. Eczema: the etiology of eczema is not clear, and it is considered to be related to heredity, neuropsychiatric factors, metabolic changes, and exposure to chemical substances. Patients calves, forearms, hands, feet and other parts of the symmetrical distribution of erythema, papules, papules, blisters, itching and other manifestations. If the patient’s legs appear eczema, it will be manifested as long blisters are very itchy. 3. Contact dermatitis: contact dermatitis is mostly considered to be caused by contact with sensitizing substances and primary irritants. The patient will manifest as pimples, papules, blisters, itching, burning pain and so on. If the patient has contact dermatitis on the legs, there will be long blisters very itchy symptoms. It is recommended that patients with itchy blisters on the legs need to consult a doctor in time, and the doctor will choose the appropriate method of treatment after clarifying the cause of the disease.