Corns on the feet are actually a kind of local keratosis due to local friction or compression. However, this corneal hyperplasia has a characteristic that the corneal form is actually a cone-like form, and the tip of this vertebral body-like vertebrae happens to be right on the bottom of the foot, so when walking or having a squeeze, there will be significant pain. Therefore, it is especially important for the prevention of corns. Usually try to wear looser shoes. If the squeeze is caused by a deformity of the toe of the foot, the deformity of the toe needs to be actively corrected.