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The meniscus is a piece of cartilage that provides a cushion between your femur (thighbone) and tibia (shinbone). There are two menisci in each knee joint.

They can be damaged or torn during activities that put pressure on or rotate the knee joint. Taking a hard tackle on the football field or a sudden pivot on the basketball court can result in a meniscus tear.

You don’t have to be an athlete to get a meniscus tear, though. Simply getting up too quickly from a squatting position can also cause a meniscal tear.