Osteoporosis is a disease that weakens bones, and if you have it, you are at a greater risk for sudden and unexpected bone fractures. It also increases the risk of fractures in the spine, wrists, and hips. Osteoporosis means that you have less bone mass and strength. This happens when the bone density becomes so low that it causes damage to surrounding tissues including organs which can result in pain, deformities, loss of independence, increased risk for falls, and bone fractures.