Osteoporosis causes bones to become weak and brittle so brittle that a fall or even mild stresses such as bending over or coughing can cause a fracture. Osteoporosis-related fractures most commonly occur in the hip, wrist or spine. Bone is living tissue that is constantly being broken down and replaced. Osteoporosis occurs when the creation of new bone doesn't keep up with the loss of old bone. Osteoporosis affects men and women of all races. But white and Asian women — especially older women who are past menopause are at highest risk. Medications, healthy diet and weight-bearing exercise can help prevent bone loss or strengthen already weak bones. There typically are no symptoms in the early stages of bone loss. But once your bones have been weakened by osteoporosis, you might have signs and symptoms that include: Back pain, caused by a fractured or collapsed vertebra, Loss of height over time, A stooped posture, A bone that breaks much more easily than expected