The foot has a lot of corns because the local skin on the bottom of the foot is under long-term pressure and friction, causing limited, cone-shaped keratosis, common triggers are too tight shoes, foot bone deformity, feet suffering from ringworm, etc. Some people are prone to grow corns on their feet due to excessive activity and long walking hours. When corns appear on the feet, they will be pinhead or bean-like in size, pale yellow or dark yellow, with a smooth surface parallel to the skin surface or elevated, clear borders, and inverted cone-shaped keratin plugs embedded in the dermis in the center, and will cause pain or discomfort when walking. When corns appear on the soles of the feet, those with mild symptoms can use localized corns patch, while those with severe symptoms are recommended to be treated by laser or freezing, which can achieve the effect of cure in a short time. When using laser or freezing for local treatment, avoid standing for long periods of time to avoid aggravating the local swelling and pain.