The so-called knee injection of sodium hyaluronate refers to the injection of sodium hyaluronate into the cavity of the knee joint, the advantages of which are mainly lubrication of the knee joint, protection of the articular cartilage, and relief of knee pain, etc., and the disadvantages of which are mainly the lack of attention to the aseptic operation of the puncture, leading to infection, and the damage of synovial membrane caused by the inappropriate method of puncture. 1. Advantages: Sodium vitrate injected into the knee joint can play a lubricating role between the joint surfaces and protect the cartilage in the joint, especially for the presence of osteomalacia and other lesions in the joint cavity, it can prevent further damage to the cartilage and alleviate the pain in the knee joint caused by arthritis and osteomalacia. 2. Disadvantages: When performing sodium vitrate puncture, strict aseptic operation is required, using iodophor, alcohol and other disinfectants to wipe and disinfect the puncture site, if no attention is paid to the aseptic operation, it is easy to lead to bacterial infections at the puncture site as well as in the joint cavity. If the puncture method is not correct, the needle can puncture the synovial tissue in the joint, causing damage and pain. It is recommended that the patient go to the hospital to complete all auxiliary examinations to clarify the condition and have the puncture performed by a professional physician to avoid the occurrence of related complications.