When a meniscus injury is followed by a relatively mild injury, such as meniscus I injuries and meniscus II injuries, it is possible to do intra-articular sodium vitreous acid injections when treated strictly conservatively. Mild meniscus injuries treated conservatively with intra-articular sodium vitrate injections can accomplish several things. First of all, it is the nutritional effect on the meniscus, when the meniscus needs nutrients for its recovery after the injury, but the meniscus itself has poor nutritional status, and it can only rely on a small amount of synovial fluid to get nutrients, and at this time, the injection of intra-articular sodium hyaluronate injection can play a nutritional role. Secondly, intra-articular injection of sodium hyaluronate can also lubricate the joints and prevent the meniscus from being overstressed and aggravating the injury.