Thanks for posting your query
You are suffering from osteoarthritis
But to asses the whole condition , X-ray of your knee in standing position is required.
It detects that your osteoarthritis is in which stage, so treatment plan according to that.
In patients with osteoarthritis, the concentration &molecular weight of hyaluronic acid
is decreased, so Intra-articular injection of this thought to be possible treatment of osteoarthritis.