If you have a hard callus in the middle of your foot, consider corns, metatarsal warts or calluses, try to get rid of the causative factors, avoid friction, and choose the appropriate treatment according to the cause of the disease, which usually includes medication, physical therapy, surgical treatment and other methods. 1. corns: if not subjected to friction or external extrusion can be naturally healed, can also be used to soak the foot in hot water for about half an hour, to be soft corns, knife to remove the keratin damage, and with the perforated cotton pads will be damaged in the hole cover; can also be used externally corns cream, 50% salicylic acid ointment and other treatments; freezing, laser and other physical methods can be removed from the corns. 2. metatarsal warts: the treatment should be based on the size of the damage, the location and the degree of pain, the smaller metatarsal warts can be removed by laser, liquid nitrogen or electrocoagulation; if the lesions are large can also be used to surgical excision method to get rid of. 3. callus: can have a protective effect, generally do not need to treat, if the lesion is thicker, there is pain, can be softened with hot water soak with a knife trimming, can also be used externally with salicylic acid ointment, vita-acid ointment and other exfoliators. When there is a hard callus in the middle of the foot that needs to be removed, it is recommended to consult a professional for treatment and adhere to the treatment. The medications mentioned above need to be used in accordance with medical advice.