About one in four adults experience chronic knee pain ... source of the swelling, she says. According to the American Academy of Orthopaedic Surgeons, meniscus tears are among the most common ...

It may occur due to a blow or force to the outer aspect of the knee, which may result in a strain on the inner aspect of the knee. This injury usually results in almost immediate swelling or pain.

A meniscus tear often occurs during activities that involve twisting or rotating the knee, such as pivoting during sports. This injury can lead to pain, swelling, and difficulty moving the knee.