Indications: General mild to moderate osteoarthritis, mild to moderate damage to articular cartilage and post-arthroscopy can be treated with intra-articular sodium hyaluronate injections. The injection regimen is once a week, and the medication is usually injected five times. The feeling when injecting sodium hyaluronate should be like this: 1. It hurts a little when the needle goes through the joint capsule during injection, like a shot in the buttocks. But the needle into the joint to start pushing the drug until the drug should not hurt, if the drug in the process of pushing obvious pain, it means that the needle tip is not in the joint cavity, not playing in the joint, the pain will be very intense after the injection, but also affect the injection effect. 2, under normal circumstances, after the injection, the knee joint will be some mild pain or discomfort, 1 to 3 days after the injection will disappear, by the next injection should be fully recovered. If the knee joint is very painful after the injection and lasts for a long time, it is not normal. If you feel abnormal during and after the injection, you can compare the injection with another doctor, and the efficacy can generally be guaranteed by a specialist. Precautions after the injection: 1, pay attention to rest, do not move for a long time, try to avoid squatting toilets, up and down stairs, which have a greater impact on the joints. 2, under the guidance of the doctor to carry out special functional exercises of the knee joint, in order to maintain the effect.