Osteoporosis is one of the most familiar words to patients in orthopedic clinics, and many doctors have the experience that patients with back and leg pain, joint pain, and leg cramps ask their physicians if they are caused by osteoporosis, indicating that patients are both familiar and unfamiliar with osteoporosis. Because there are still some misconceptions about osteoporosis, even sometimes other diseases are treated as osteoporosis and the treatment is delayed.