A meniscus tear is an injury to the cartilage in the knee, which acts as a cushion between the thigh bone and the shin bone. This tear can occur during activities that involve twisting or turning, especially when the knee is bent. Symptoms often include pain, swelling, and difficulty moving the knee. Treatment for a meniscus tear may involve rest, ice, and physical therapy. In some cases, surgery might be necessary to repair the tear. It's important to seek medical attention if you suspect a meniscus tear, as early intervention can help prevent further damage to the knee joint.