Meniscus tear is very common knee injury. Its commonly caused by twisting injury of knee.
Causes
A meniscus tear can result from any activity that causes you to forcefully twist or rotate your knee, such as sudden stops and turns while playing. Even kneeling, deep squatting or lifting something heavy can sometimes lead to a torn meniscus.
In older adults, degenerative meniscal tear can develop with little or no trauma.