Non-surgical treatments to treat knee arthritis include medication, physical therapy, losing weight and corticosteroid injections. If these treatments aren’t working well you could try a procedure called viscosupplementation.
Your doctor will inject hyaluronic acid into your knee joints. Hyaluronic acid is a gel like substance commonly used in cosmetic surgery. It is produced naturally in the body to provide lubrication. Many people who suffer from knee arthritis have a low concentration of hyaluronic acid surrounding their joints.
The injection of gel boosts the level of hyaluronic acid which may decrease pain and facilitate better movement.
For further reading: