After the injection of sodium glass acid leg more pain, mainly due to the following reasons: 1, because the inflammation of the knee joint at the time of the injection of sodium glass acid is more serious, inflammation is not well controlled, the injection of sodium glass acid may further stimulate the increase of fluid in the joint cavity, resulting in increased pressure in the joint, resulting in further aggravation of pain. Therefore, it is important to keep the inflammation of the knee joint under control before the injection of sodium vitrate, and not to perform sodium vitrate injection during the acute phase of knee inflammation. Therefore, during the period after the injection of sodium vitreous acid or injection, anti-inflammatory and analgesic drugs should be routinely given, because sodium vitreous acid itself does not have a pain-relieving effect, it is by giving a certain lubricating effect within the champion, promoting the reduction of friction in the joint cavity, promoting the formation of articular cartilage, to improve the symptoms of arthritis. 2, the injection of sodium vitreous acid to the soft tissue is damage, because the needle of the syringe Zap to the cartilage of the joint, will also cause further pain in the leg, so after the injection of sodium glass acid rest for 3-5 days, 3-5 days before gradually moving the knee joint.