If there is fluid in meniscus grade 3, on one hand, it can be absorbed by braking, on the other hand, it can be extracted by sterile puncture, and most of the meniscus grade 3 injuries need surgical treatment. 1. Small amount of effusion: Most of the patients with small amount of effusion in meniscus grade 3 are recommended to take strict braking, cold compresses can be given in the acute stage, and hot compresses can be given in the later stage, and most of the effusion can be absorbed by themselves, and the amount of effusion can be determined by physical examination and magnetic resonance imaging. 2. More fluid: For patients with more fluid, aseptic puncture is recommended to extract the fluid. After extracting the fluid, it is recommended that the patient brakes for one week to two weeks to reduce the weight bearing of the knee joint to avoid oozing. 3. Meniscus third-degree injury: it can be treated by surgery, which can take partial excision or suture. Most of the meniscus third-degree effusion can be diagnosed by systematic examination and magnetic resonance, and most of them need to be evaluated by professional physicians to determine their treatment plan, timely consultation in hospitals and targeted perfect examination.