ACL surgery is a procedure that doctors use to replace a torn ligament in your knee.
The ACL (anterior cruciate ligament) is a band of tissue inside your knee. It gets damaged when it stretches or tears. ACL injuries are common among people who play sports because they make movements that can put a lot of stress on the knee.
If you strain or slightly tear your ACL, it may heal over time with your doctor’s help and physical therapy. But if it’s completely torn, you may need to have it replaced -- especially if you’re young and active or an athlete who wants to keep playing sports. If you’re older or less active, your doctor might recommend treatments that don’t require surgery.