There is no particular harm in terms of vitreous acid sodium injection in the knee alone, but the determination of whether it is good or not depends on whether there is a suitable indication in itself. At present, it is common to administer sodium vitreous acid in early or mid-stage osteophytes and osteoarthritis, and after arthroscopy or arthroscopic meniscal ligament surgery in the knee joint, which can be very beneficial in relieving knee pain and other symptoms. However, if there is a serious fracture or soft tissue injury in the knee joint, sodium vitreous acid is not beneficial and is not recommended. Sodium vitreous acid can be used to lubricate the knee joint, which is similar to the small amount of joint fluid in the physiological joint cavity.