The main reason for the formation of corns is the friction and extrusion caused by the skin cuticle thickening, the formation of a transparent soy-sized hard nodules, generally pale yellow, looks like a chicken eye, so the disease of this cuticle thickening is called corns. The main reason for the occurrence of corns is related to the wearing of shoes that do not fit the feet, long-term friction between the feet and shoes, the skin is being squeezed more and more powerfully, forming a kind of sharp bottom end, the top of the round flat vertebrae, whenever walking vertebrae squeeze other tissues, so it is very painful. It is recommended not to wear high heels to wear cloth shoes, sometimes corns can slowly recover without treatment, has affected the walking patients, or active treatment, no painful way is to do isotope strontium 90 irradiation.