Corns can be a common disorder of the foot that may be painful and hard to treat. Corns are caused by an excessive amount of pressure on an area of the skin. They are part of a natural mechanism that has gone awry. Whenever there is too much pressure on the skin, that area of skin will thicken up to protect itself. If the pressure goes on over a extended period of time, it becomes so thick that it is painful. This can be similar to the mechanism that occurs when, for example, cutting up wood. Doing this, you eventually make a callus on your palm. The same thing happens on the foot with pressure from the surface or pressure on a toe from footwear. When you halt chopping wood, the thicker skin on the palms disappear. The problem in the foot is that you keep using footwear and you keep walking, so the pressure continues and the thicker skin forms into a corn and becomes painful.
Getting rid of corns is actually easy and a skilful podiatrist could easily take them off. That's the easy bit. The difficult part is stopping them coming back. It is one thing to remove them, however if you don't get rid of that cause (the greater pressures on the location), then they will just keep coming back eventually. Corns do not have roots which they re-grow from. They keep coming back as the cause remains. Removing a corn is much like dealing with the symptom. They are going to return unless the cause is removed. This is where the skill of a podiatrist is needed to identify the proper cause. A complete assessment is necessary of the biomechanics, shoes, foot structure and activities to sort out just what it is that causes the higher pressure. Once that reason has been identified, then different treatments may be used to remove that pressure. This might vary from simple footwear suggestions to foot supports to surgical procedures.