As well as causing toe deformities, calluses, corns, bone spurs and other problems, wearing the wrong shoes puts tendons, joints and entire muscle groups at risk of injury. The main culprit for all this damage? High heels. They drastically alter the wearer’s posture, displace the foot and ankle bones, strain the knee joints and tighten the surrounding tendons. What’s worse, these conditions can lead to osteoarthritis, a very painful and sometimes debilitating joint condition.