CSP: breaks or rupture in bones or cartilages.,MEDLINEPLUS: A fracture is a break, usually in a bone. If the broken bone punctures the skin, it is called an open or compound fracture. Fractures commonly happen because of car accidents, falls or sports injuries. Other causes are low bone density and osteoporosis, which cause weakening of the bones. Overuse can cause stress fractures, which are very small cracks in the bone. Symptoms of a fracture are Out-of-place or misshapen limb or joint Swelling, bruising or bleeding Intense pain Numbness and tingling Limited mobility or inability to move a limb You need to get medical care right away for any fracture. You may need to wear a c