Meniscus injury, mostly caused by trauma, mostly seen in the knee joint semi-flexion when rotating external injuries, meniscus injury, will affect the femur, tibia articular cartilage, an analogy, articular cartilage is like a tire, the meniscus is like the road, the road is smooth and smooth, the tire can be used for a long time, and finally normal end of life, if the road potholes, uneven, in that case, the tire will soon wear out, and wear out the cartilage is not renewable. The cartilage is not renewable. The joint replacement will have to be considered, and there is no good way to treat cartilage wear damage, so once the meniscus is damaged, it is best to do a minimally invasive surgery in time. Especially for young people.