Hi 2007fusion, it is probably arthritis. I have personal experience of this condition, you need not be elderly, even a cousin of mine who is 26 has it. (rheumotoid arthritis) Its best to consult a physician, if the pain is very severe they will probably prescribe steroids for a period of time, it is not a condition that can be predicted, sometimes it can just go into remission.
The condition can also be controlled through diet (eating less red meats and more vegetable) doing exercise like swimming and walking, and taking Omega 3 Cod Liver oil capsules (1 a day). also taking Manuka honey is supposed to help.