[Therapeutic effect of hyaluronic acid injection for knee and shoulder joint]

It is known that hyaluronic acid can protect against damage to articular cartilage and helps to lessen friction between joint surfaces. Furthermore, it is reported that hyaluronic acid is effective for pain relief and for the risk of adhesion, and contractures of joints. The injection of hyaluronic acid is useful for the treatment of frozen shoulder, osteoarthritis, and rheumatoid arthritis. The risk of infection is a rare, though important, possibility, however this method is relatively safe.