There are quite a few different types of corn that can affect the feet.
1. There are shoe corns that develop on the top and side of the toes from shoes that are too tight.
2. There are hard corns that develop underneath the foot from high pressure areas.
3. There are soft corns that predominantly affect in between the toes from where the bones of the toes touch each other and cause a very painful soft corn that looks white and rubbery.
4. There are seed corns that are genetic that are very very small and they look like they have been scattered across the sole of the feet and there are no bigger than the size of a pin head and actually very painful as they have in there is a touch to them.
5. There are bio mechanical corns also that develop underneath the foot usually from a dropped bone or an enlarged bone inside the foot.
So the podiatrist must first investigate what type of corn you have to advise what type of treatment will reduce or stop the corn from coming back.