A knee fracture is a break in one or more of the bones that make up the knee joint, such as the patella (kneecap), femur (thigh bone), or tibia (shinbone). It can be caused by traumatic injuries like falls, sports-related incidents, or vehicular accidents. Symptoms include severe pain, swelling, bruising, and difficulty bearing weight on the affected leg. Treatment options depend on the type and severity of the fracture but may include immobilization with a cast or brace, surgery to realign the bones, and physical therapy to aid in recovery and rehabilitation.