Corns are not contagious; this condition is usually caused by prolonged friction and compression. Corns are characterized by thickened skin, commonly found on the soles of the feet, the front-middle parts of the toes, and the outer edges of the little toes. If corns develop, it is important to eliminate the cause. If there is long-term friction or compression on the feet, it must be avoided. Wear appropriate shoes to reduce pressure and friction. For treatment, you can apply corn treatment ointments. (For specific medications, please administer them under the guidance of a professional physician and do not self-medicate blindly.)