The ACL is a vital ligament within the knee, imparting essential stability. This ligament safeguards against excessive knee rotation and prevents the shinbone from shifting forward. Those with an ACL tear typically detect a popping sensation or sound in the knee. This can lead to feelings of knee instability and weakness. While ACL tears often cause significant pain, some individuals might only experience mild discomfort. If you attempt to put weight on the injured leg, you might notice increased difficulty in walking. Additionally, some individuals perceive a sense of looseness in the knee joint, beyond what is considered normal. ACL injuries are often categorized into three grades: Grade 1, Grade 2, and Grade 3. A Grade 1 sprain signifies minimal ligament damage, allowing for the maintenance of knee joint stability. In the case of a Grade 2 sprain, the ligament has been stretched to the extent of partial tearing. When it comes to a Grade 3 sprain, the ligament is fully torn, resulting in its separation into two distinct pieces and causing instability in the knee joint. An ACL tear can potentially lead to damage or tearing of other knee ligaments as well. This underscores the complexity and interconnectedness of structures within the knee joint.