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They often form on feet and toes or hands and fingers. If you’re healthy, you don’t need treatment for corns and calluses unless they cause pain or you don’t like how they look. For most people, simply removing the source of the friction or pressure makes corns and calluses disappear. They can vary in size and shape and are rarely painful. Corns and calluses are not the same thing. Corns are smaller and deeper than calluses and have a hard center surrounded by swollen skin.

They can be painful when pressed. Hard corns often form on the top of the toes or the outer edge of the small toe. Soft corns tend to form between the toes. Calluses are rarely painful and tend to develop on pressure spots, such as the heels, the balls of the feet, the palms and the knees.

They may vary in size and shape and are often larger than corns. If you have diabetes or poor blood flow, seek medical care before self-treating a corn or callus. Learn more about Mayo Clinic’s use of data. To provide you with the most relevant and helpful information, and understand which information is beneficial, we may combine your email and website usage information with other information we have about you. If you are a Mayo Clinic patient, this could include protected health information. You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox.

Tight shoes and high heels can squeeze areas of the feet. If your shoes are loose, your foot may repeatedly slide and rub against the shoe. Your foot may also rub against a seam or stitch inside the shoe. Socks that don’t fit right can also be a problem. Wearing shoes and sandals without socks can cause friction on your feet.