Ive got arthritis in my knees, fingers and ankles due to a mixture of things. My knee pain tends to come and go but glucoasmine is great. You might want to see if you can get it in pill form mixed with some cod liver oils. Glucosamine repairs joints and cartilage as Missy has said. Also you can get glucosamine gel which is useful.

All above is good advice.

I am on meds from the doc after i was diagnosed and this helps the arhtiritis. Dodgy knees run in our family though. Best wait til you get a proper diag from the doc first.