Blisters on corns on the feet can be treated by changing comfortable shoes to avoid friction, topical corns cream as prescribed by the doctor, laser or freezing, and surgical treatment. Corns are caused by prolonged friction or pressure on the feet, resulting in hyperplasia of the stratum corneum. You can try to wear loose and comfortable shoes and avoid long-term friction on your feet to prevent corns from occurring and to alleviate or prevent aggravation of the condition. Under the guidance of a physician can be used externally corns cream or 10% salicylic acid ointment, most of the medication can be cured, but a small number of people using drugs may appear local irritation, dermatitis and other adverse reactions. If the blister breaks, it is not recommended to use, can be clean cotton gauze temporary bandage, to avoid wound infection. If the corns are large, laser, electrocautery or cryotherapy can be used. As well as under local anesthesia, such as corns excavation, can completely remove the growth. Blisters on corns should be avoided to avoid the blisters bursting and becoming infected, and when accompanied by other obvious physical discomfort, timely medical treatment is required.