What is a common indicator of a ligament injury?

A common indicator of a ligament injury is joint instability or excessive joint movement. Ligaments are fibrous tissues that connect bones to one another, providing stability to the joints. When a ligament is injured, it often results in a loss of this stability, leading to abnormal movement of the joint.

This joint instability can manifest as the joint feeling loose or giving way during activities, which is particularly evident in injuries to major ligaments, such as the anterior cruciate ligament (ACL) in the knee. When there is a significant tear or sprain, the joint may not be able to withstand normal forces, resulting in instability that can cause further damage or dysfunction if not addressed.

While swelling, bruising, persistent pain, and limited range of motion are indeed associated with ligament injuries, they do not specifically indicate the loss of joint stability. Therefore, the defining feature that aligns closely with ligament injuries is the instability or excess movement at the joint, making it the most relevant choice.