Calluses are hardened areas of skin caused by ... In under five minutes, I’m able to smooth out rough patches on my heels and on the outside of my big toes with just the fine-grit side.

Cracked heels aren't usually dangerous, but sometimes they can get infected and lead to a skin infection called cellulitis. Heel fissures, or cracked heels, happen when the skin on the bottom of ...

A callus can form on the hands due to repeated friction caused by manual labor, regular running, or the wearing of high heels. Calluses can heal on their own if the irritation is removed.