You can consider surgery to get rid of a callus, but there's no guarantee the callus won't come back. First, try making some changes at home. Keep the feet dry and friction-free. And wear properly fitted shoes and cotton socks, not wool or synthetic fibers that might irritate the skin.
If a podiatrist or orthopedist thinks your corn or callus is caused by abnormal foot structure, walking motion, or hip rotation, orthopedic shoe inserts or