Degeneration of the posterior horn of the medial-lateral meniscus of the right knee is generally not serious, and when there is a posterior horn meniscus tear, it is generally more serious. 1. Posterior horn degeneration of right knee medial meniscus: mainly due to meniscus degeneration, but also seen in chronic knee joint chronic injury, long-term high load activity injury, stimulation. It can be manifested as soreness in knee flexion, and posterior horn degeneration can be seen in MRI examination of the knee, which generally does not require special treatment. Generally, no special treatment is needed. Observation is the mainstay. 2. Tear of the posterior horn of the inner and outer meniscus of the right knee: mostly seen in trauma, but also seen in the late stage of osteoarthritis of the knee, rupture caused by extrusion and wear and tear, generally more serious. It can be manifested as knee pain, elasticity or joint interlocking symptoms, and the posterior horn tear can be seen in MRI of the knee, which usually requires arthroscopic surgical suture or molding treatment. The posterior horn degeneration of the medial and lateral meniscus of the right knee can be observed when asymptomatic, and when symptoms of knee discomfort occur, hospitalization is required, and appropriate treatment is received when necessary.