If corns develop on the toes, they may be caused by localized friction and extrusion, which may be due to improper walking patterns or excessive squeezing of the patient’s shoes, resulting in localized keratosis and eventual formation of corns. The clinical manifestations of corns are mainly translucent, yellowish, keratinized skin lesions on the skin of the stressed area, which are painful if pressed by hand, and form a clear edge from the appearance of the lesions, similar to corns, so some people call it corns.