Depending on your body and blood type diet could be a contributing factor. I've had symptoms of mild arthritis for years in my hands and wrists, in addition to a back injury that made me shrink an inch and a bad knee. Some things that have worked for me though, I started taking bilberry for my eyes, and noticed after taking it for a couple months that my joints hardly hurt anymore.
In addition to that, as mentioned above, I started using the paleo diet as a guide since it's essentially close to the recommended diet for my blood type(O), and since i've been eating less carbs and more protein, and especially since switching to organic foods from the hormone and steroid laden meats, I hardly have any joint aches and the little aches and pains are almost all gone.
But of course, all bodies are different, and what works for me might be the opposite of what someone else needs. Just have to try different stuff and see what works