Symptoms of posterior horn meniscus tear mainly include knee pain, popping and ringing, limited movement and joint degeneration. 1. Pain: When the posterior horn of the meniscus is torn, pain in the joint may occur when walking or exercising, especially when flexing or extending the knee, the pain will be significantly worse. There is also significant pain when going up stairs. 2. Knee popping: After tearing the posterior horn of the meniscus, a clicking and popping sound may be produced in the knee joint cavity. 3. Restriction of activities: On the one hand, the pain may lead to restriction of knee joint activities; on the other hand, if the meniscus tear is more serious, joint interlocking may occur, which is manifested as a sudden restriction of knee flexion and extension and inability to move when walking, squatting and other activities. 4. Joint degeneration: If the meniscus is torn for a long time without timely diagnosis and treatment, the torn meniscus will easily involve the synovial tissues and even wear down the articular cartilage, accelerating joint degeneration or developing into osteoarthritis. When there is a suspicion of a torn posterior horn of the meniscus, it is important to consult a doctor in time to receive professional diagnosis and treatment, so as to avoid serious consequences.