After meniscus injury, you can inject sodium vitrate into the joint cavity. It is relatively difficult to recover after meniscus injury, mainly because of the poor blood supply and nutritional function after meniscus injury. The main nutritional supply of meniscus is by the synovial fluid in the joint, and the amount of synovial fluid is relatively small, and the blood supply of meniscus is also poor, only a little blood supply is available at the stop of meniscus, so it is difficult to recover after meniscus injury. Intra-articular injection of sodium vitrate can promote meniscus repair, make the joint surface more lubricated, and reduce the pain of the joint during movement. However, sodium vitrate is not a panacea, and it can only restore the degree of meniscal damage.