Small blisters (blisters) on the surface of the foot is very itchy may be tinea pedis, eczema, sweat herpes and other diseases caused by, should promptly consult a doctor and the appropriate treatment. 1. Tinea pedis: the disease is caused by dermatophyte infection, the foot will appear small blisters, with itching, in addition, there will be foot skin keratinization, desquamation, can be used externally ketoconazole cream and other antifungal drugs. 2. Eczema: small blisters on the top of the foot is very itchy may also be caused by eczema, the cause of the disease is not clear, is inside and outside the multi-factorial inflammatory skin disease. Patients will also have symmetrical polymorphic rash, can be used under the guidance of a doctor, such as mometasone furoate cream glucocorticosteroid cream, oral antihistamine drugs such as loratadine treatment. 3. Sweat herpes: also known as sweat not good eczema, etiology is unknown, symmetrical occurrence in the hands and feet blistering skin disease, more than one year recurrence, can follow the doctor’s instructions for the external use of quinacrine urea cream and other glucocorticosteroid ointment, oral loratadine and other antihistamine medication. Small blisters on the top of the feet may also be caused by other diseases, it is recommended that patients go to a higher level hospital in time, after a clear diagnosis, standardized treatment under the guidance of the doctor.