Whether corns are healed can be judged by the flatness of the skin and the pain. If the affected skin is flat, the corns are completely cleared of diseased tissue, and the pain disappears when walking or pressing on the affected area, then the area is healed. There are several methods to treat corns: 1, external corrosive agents: for more superficial corns, it is recommended to use corrosive agents to remove corns under the guidance of a doctor, such as corns cream and corns patch, also available salicylic acid glacial acetic acid solution for treatment, pay attention to protect the surrounding healthy skin; 2, physical therapy: for deeper and larger corns, laser cautery, X-ray irradiation, liquid nitrogen freezing methods can be used to remove; 3. Surgical removal: If the patient has a thicker corneal layer, the corns are prone to recurrence and the effect of medication is not good, you can choose surgical removal and strengthen the postoperative care. However, it should be noted that corns are prone to recurrence and are related to local joint deformity, bone deformity, and abnormally high skin. Attention should be paid to the protection of local skin while treatment. Patients should pay attention to foot hygiene, wash feet more often with warm water, protect the local skin of the feet, try to wear loose, soft shoes, do not rub and squeeze the local skin to avoid recurrence of corns.