How to get rid of my corns permanently?

See below. Corn are usually formed over areas of pressure such as bone. Often times the bone under the corn needs to be removed or smoothed. You can also try shoes that have more toe room so no pressure is on the toes.
Address cause. This often includes surgical intervention to remove any deformity or boney prominence which is causing corn to form. Occasionally, something as simple as changing to better fitting shoes can eliminate problem.