After the injection of sodium vitrate, the following precautions should be taken: 1. After the injection, flexion and extension activities of the knee joint should be carried out, which can help sodium vitrate to be evenly distributed in the joint cavity and play an obvious lubricating effect, effectively inhibiting the degeneration of cartilage and the formation of osteoarthritis. 2. After the injection, attention must be paid to keeping warm and not getting cold, because getting cold will lead to a slowing down of blood circulation and the accumulation of inflammatory metabolites. The accumulation of inflammatory exudates may lead to a gradual increase in fluid in the joint cavity, which, together with the sodium glass solution, may lead to increased pressure in the joint capsule and increased pain. 3. Be sure to pay attention to not getting wet, because getting wet may cause infection and stimulation of the needle eye, leading to infection of the entire joint cavity. 4. Be careful not to flex and extend the knee joint, such as climbing stairs, hills and bicycles, these frequent flexion and extension movements often lead to increased degeneration of joint cartilage, osteoarthritis appears earlier, resulting in gradual aggravation of the condition.