Cách sử dụng
A callus is an extra layer of tough skin that forms when a part of your skin has been rubbed or pressed a lot. You can get calluses on your hands, feet, or any other area that experiences a lot of friction. It's important to keep your calluses moisturized to prevent them from cracking and becoming painful. Sometimes, calluses can be removed using special tools or treatments, but they usually serve as a protective barrier for your skin.