Army Deployed Medical Practice Test

Swelling and a crackling sensation under the skin point to a break in the bone with tissue injury, which is a strong indicator of a fracture. Swelling results from bleeding and inflammation around the injured bone, while crepitus occurs when broken bone fragments move or air is present in the tissues, producing that unmistakable crackling feel or sound. Together, they are reliable signs that the limb could be fractured. Numbness without swelling can happen with nerve involvement but isn’t a definitive sign of fracture on its own. Bruising by itself can occur with many soft-tissue injuries and doesn’t prove a fracture. Redness alone is not specific to fractures and can come from irritation or other causes. If you suspect a fracture, immobilize the limb and seek prompt medical care, ensuring distal sensation and circulation are checked before and after immobilization.