How common is knee locking in meniscus tear?

A meniscus tear may cause catching, clicking, or a true block to movement. The meniscus is a shock-absorbing pad between the thighbone and shinbone. When part of it is displaced or swollen, it can interfere with straightening or bending. Pain and swelling may also make the muscles tighten, creating a feeling of stiffness that differs from a physical block.

The pattern matters: note whether locking began after a twist, whether the knee swelled, and whether it releases. Knee locking is a presentation of meniscus tear, but the symptom alone cannot establish the diagnosis. Examination may include checks of joint-line tenderness, motion, and stability.

Avoid twisting, kneeling, deep squats, and impact activity until the knee has been assessed. If it catches, stop and let it settle rather than forcing it straight. Use a handrail and take shorter steps if walking feels unsteady. A cloth-wrapped cold pack can help with swelling for brief periods; protect the skin.

Arrange an orthopaedic or physiotherapy review, especially when locking repeats or interferes with work or sleep. Treatment depends on tear pattern, symptoms, age, activity needs, and examination findings. It may involve rehabilitation, activity changes, or a procedure when tissue remains mechanically trapped.

Seek urgent assessment if the knee remains locked, you cannot bear weight, or a major injury causes rapid swelling or marked pain. Go promptly if the leg is deformed or the foot becomes numb, cold, pale, or weak. Do not attempt to manipulate the joint back into place.

Ask whether the pattern suggests a displaced tear, whether imaging is needed, what movements are safe, and how soon rehabilitation should start. Ask how to tell a painful stiff knee from a true mechanical lock.