Third degree meniscus tear mostly refers to meniscus tear third degree, belongs to more serious meniscus injury, usually need surgery, if strongly request conservative treatment, can also be conservative treatment first, but may not be effective, there is a risk of delaying the condition, it is recommended that surgical treatment. Meniscus tear grade three, because the involvement of the joint surface, affecting the normal activities of the knee joint, so belong to the more serious meniscus injury, usually need surgery to sew the meniscus. Conservative treatment is mostly applied to meniscus tears below grade 2 that do not involve the joint surface, mainly reducing activities, wearing protective gears, and taking oral glucosamine sulfate to nourish the cartilage. For grade III and above meniscus tears, conservative treatment is ineffective and time-consuming, and only a few patients are able to recover or go into remission. If there is a desire for conservative treatment, conservative treatment can be given first, but there is a risk of delaying the condition, and surgical treatment is recommended. After the occurrence of third-degree meniscus tear, it is recommended that under the guidance of the doctor, combined with their own situation, choose the appropriate treatment program, do not blindly use drugs.