Calluses on the outside of the big toe, mainly due to poor daily habits, long-term friction and extrusion, improper pedicure and other factors, resulting in foot skin keratin growth. 1, poor daily habits: such as walking long distances often, walking posture is incorrect, etc., will lead to excessive friction between the outside of the big toe and shoes, with the passage of time will form calluses; 2, long-term friction and extrusion: long-term wearing of high-heeled shoes or wearing relatively hard, not fit Foot shoes, frequent friction, squeeze the outside of the big toe, may cause the foot calluses; 3, frequent pedicure: pedicure too often will stimulate the skin keratin layer proliferation, resulting in foot calluses grow faster and faster, generally about half a year to repair. For the thinner foot calluses, you should use warm water to soak your feet, so that the cuticle absorbs water to soften, and then use the light and porous water pumice gently rub off the foot calluses. You can also do appropriate foot massage and care every day, apply moisturizing effect of moisturizing cream. If the foot callus is thicker and affects daily life and walking, you should go to the dermatology department for treatment in time. Usually pay attention to the choice of suitable shoes to avoid friction and pressure on the foot, and always wear cotton socks. In addition, pay attention to differentiate from corns, plantar warts, palmoplantar keratosis and other diseases.