What are the symptoms of a ligament tear?

A ligament tear can cause sudden pain, swelling, bruising, and difficulty using the affected joint. The joint may feel unstable, weak, or as if it is going to give way. In knee ligament injuries, patients may have trouble walking, changing direction, or putting full weight on the leg. Some people hear or feel a popping sensation at the moment the injury occurs.

Symptoms vary depending on which ligament is injured and whether the tear is partial or complete. Swelling may appear quickly with some injuries, while other ligament problems cause less immediate swelling but ongoing instability. A person can sometimes still walk even with a significant tear, so the ability to walk does not rule out serious injury.

An orthopaedic examination is usually needed to identify the injured structure. X-rays may be used to check for fractures, while MRI is often helpful for evaluating ligaments, meniscus, cartilage, and other soft tissues. Persistent instability or severe symptoms should be assessed promptly.

Some symptoms can overlap with fractures, meniscus tears, tendon injuries, or simple sprains, which is why self-diagnosis can be difficult. If the joint repeatedly gives way, swelling returns with activity, or pain persists after the initial injury, a specialist assessment is useful even if the patient can still walk.