Corns are caused by friction, when the affected part of the foot is repeatedly rubbed. There are a number of things which can lead to the appearance of corns.
Ill-fitting shoes: When it comes to corns appearing on the top of the foot, shoes that don’t fit properly are the number one culprit. Shoes that are too tight rub against the skin, causing friction, leading to the formation of corns. Shoes that are too loose can cause the foot to slide, repeatedly rubbing against the shoe.
Walking or running: Walking or running for long periods of time, for example running a marathon, can cause corns. It is particularly important that you invest in a quality pair of walking or running shoes to minimise the chances of rubbing.
Wearing shoes without socks: Wearing shoes without socks means the shoe is rubbing against the skin rather than the sock, leading to corns.
Foot deformities: Bunions, hammertoes, claw toes, tailor’s bunions, bony spurs or other foot deformities can cause corns. This is because they can cause the foot to rub against the shoe, or, particularly in the case of bunions, it can lead to a person changing the way they walk, putting extra pressure on the toes.