Not many of us think about our heels—until, that is, they start complaining. With each step we take, we put 60 tons of stress on each of our feet, according to the American Academy of Orthopaedic Surgeons (AAOS). And even when we stand still, our heels have to absorb our body weight. Add bad biomechanics and the wrong shoes, and it’s no wonder that our heel bones and the tissues attached to them start to ache. The good news: “Most heel pain can be prevented and easily treated,” says Dr. Elizabeth Matzkin, a spokesperson for the AAOS. Here, a look at the four most common causes of heel pain and how to prevent them.