The posterior horn of the meniscus is not the full weight-bearing area of the entire knee, so many injuries to the posterior horn of the meniscus are not particularly painful during normal walking down to the ground, but only during squatting on the posterior lateral aspect of the knee, and sometimes more pronounced during kneeling. Pain can also occur during grinding tests of the knee joint, especially in chronic injuries where the above swelling and pain symptoms are less pronounced. There is no definitive diagnosis by the above symptoms and an MRI of the knee is required to make a definitive diagnosis. The entire treatment is relatively simple: complete bed rest, oral glucosamine to nourish the articular cartilage, or intra-articular injection of sodium vitrate for symptomatic treatment.