A corn is caused by your body’s protective response to various external factors, for example, ill-fitting footwear, unfamiliar exercise or prolonged periods of standing. If you are wearing shoes that are too tight, too loose, too high or have badly placed seams, this might be the cause of your corns. Types of shoes not adapted for long time wear include high heels, pointed-toe heels, and high arched boots. Also badly fitting socks, no socks or no foot-wear at all can cause corns. This is why both women and men are susceptible to corns.
Even if you are wearing well-fitted and adapted footwear, repetitive actions, such as exercise or walking and standing at work might cause corns. Professions with a high risk of developing corns include postal workers, nurses and waiters/waitresses.
Other risk factors might be genetic or acquired, for example, by trauma or ageing. These include bunions, hammertoe or deformities of the feet as well as an abnormal gait. Since the skin becomes less plump with age and loses its fatty padding, the formation of corns, particularly under the feet, becomes more frequent.