ACL injury overview

This condition, ACL injury, occurs when the anterior cruciate ligament (ACL), the band of tissue that connects the femur to the tibia inside the knee joint, becomes torn or worn away, causing pain and instability of the knee.

ACL injury causes

An ACL tear is typically caused by a severe injury or trauma to the knee, often during athletic activities. A sudden stopping and twisting motion of the knee or a blow to the knee that forces the joint to bend beyond its normal range of motion may cause the ACL to stretch and tear.

Torn ACL symptoms

The most common symptom of an ACL injury is the pain the knee. Other symptoms of a torn ACL may include immediate weakness or a popping sound in the knee, swelling, stiffness, and bruising. Walking is painful and the knee may feel unstable.

ACL tear treatment

Treatment options for torn ACL include rest, cold compress, wrapping the knee, elevating the knee, physical therapy and anti-inflammatory medications. ACL tear surgery is commonly required.