The sequelae of meniscus injury include joint infection, muscle atrophy, arthritis, and joint interlocking. 1. Joint infection: Meniscus injury may cause different degrees of joint damage, or due to joint infection during meniscus surgery, which may lead to joint pain or limited movement. 2. Muscle atrophy: severe meniscus injury will lead to the legs can not move normally, in the long run may cause different degrees of muscle atrophy, need to actively carry out functional rehabilitation exercises to prevent muscle atrophy. 3. Arthritis: meniscus injury leads to abnormal knee joint activities, and then easily lead to increased wear and tear of the joint surface, resulting in knee joint bone, cartilage, ligament lesions, triggering traumatic arthritis. 4. Joint interlocking: after injury, the torn meniscus is easy to be stuck in the femur, tibia between the joint surfaces, triggering joint interlocking, popping, which will cause knee pain, limited activities and other uncomfortable symptoms. Meniscus injury should be timely medical treatment, follow the doctor’s instructions for treatment and prevention of complications, which will help the injury and early recovery.