Patients with Grade 3 meniscus injury usually recover in 3 to 4 months, while patients with serious conditions may take more than 4 months or even longer to recover. It is recommended to go to the hospital in time, complete the examination to clarify the cause of the meniscus injury, and then give targeted treatment or therapy. After the operation, follow the doctor’s instructions to do good nursing care and functional recovery training. 1. Minor: patients with meniscus injury grade 3 usually need arthroscopic surgery, followed by muscle training, good postoperative recovery is generally 3 to 4 months to return to normal. 2. Serious condition: some patients are physically weak and have poor postoperative recovery, after arthroscopic surgery, the recovery time is longer, patients need to go to the hospital regularly to review and adjust the treatment measures, it usually takes more than 4 months or even longer time to return to normal.