Tearing of the ACL. The ACL is a ligament that connects the tibia (shinbone) to the femur (thighbone) crossing in the middle of the knee and is necessary to help stabilize the knee joint area.

ACL injuries may occur in many different situations but are often caused by a sudden hit to the knee or a pivoting (change in direction) injury.

Pain (will vary depending on injury severity) and swelling. Instability to the knee joint area.

ACL injuries demand immediate medical attention. Depending upon the severity of the injury, surgery may be required. Range of motion exercises, ice and physical therapy are recommended before and after surgery (if required).