Corns are a common disorder of the foot which can be painful and hard to treat. Corns are caused by a lot of pressure on an area of the skin. They are part of a normal mechanism that has gone wrong. If there is too much pressure on the skin, that region of skin will thicken up to protect itself. If the pressure goes on over a longer period of time, it might be so thick that it is painful. This is just like the mechanism that occurs when, by way of example, chopping wood. Doing this, you ultimately produce a callus on your palm. Exactly the same thing takes place on the foot with pressure from the ground or pressure on a toe from footwear. When you stop chopping wood, the thicker skin on the hands disappear. The problem in the foot is that you keep using shoes and you continue 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 competent podiatrist can easily take them off. That is the simple part. The difficult part is stopping them returning. It's one thing to take them off, however unless you remove that cause (the greater pressures on the location), chances are they will just keep coming back eventually. Corns do not possess roots which they re-grow from. They return since the cause remains. Taking away a corn is much like managing the symptom. They are going to come back unless the cause is taken away. This is where the skill of a podiatrist is needed to find out the proper cause. A complete assessment is necessary of the function, footwear, foot structure and lifestyle to work out just what it is that produces the higher pressure. Once that reason has been determined, then different interventions can be used to reduce that pressure. This may vary from simple shoe suggestions to foot orthotic to surgery.