If you find your knee locking up and popping, it is most likely due to a meniscus tear.Ī meniscus tear can be caused by an injury, usually from a twisting movement or from gradual wear and tear on the joint. Your knee just won't be able to move until you are able to manoeuvre the flap out of the way, freeing up the joint. This is where part of the cartilage gets torn, but remains partially attached producing a movable flap, usually "C" shaped.Īs the knee moves around, if the cartilage flap is large enough, it can get wedged in the wrong position, blocking the joint and causing knee locking. The most common type of meniscus tear that causes knee locking is known as a bucket-handle tear. If the cartilage gets torn, the loose fragment may get stuck in the joint stopping it from being able to move. The meniscus is a thick piece of cartilage which lines the knee joint to provide cushioning and allow smooth movement. Meniscus TearĪ meniscus tear is, by far, the most common cause of the knee locking up.
True knee locking is usually caused by: 1. something is physically stopping the joint from moving. When this happens, the knee is totally blocked, unable to move at all. It often takes a few minutes of gently moving the knee, or as patients often say “waggling it about”, or sometimes professional intervention is needed to get the fragment to move out of the way, before you can move the leg again. If something gets caught inside the knee joint, it blocks the movement and the leg gets stuck. The knee joint is designed to bend up and down, flexion and extension, and rotate slightly. Here, we will look at the common causes of both types of knee locking and then go on to look at the best locked knee treatment options. Here, knee movement is limited by temporary by muscle spasming as the body tries to protect itself in response to pain.
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