The symptoms of a degenerative knee joint usually begin as pain while bearing weight on the affected knee. You may limp and the knee may become swollen with fluid. The degeneration can lead to a reduction in the range of motion of the affected knee as the knee bends less than normal and may lose the ability to completely straighten out. Bone spurs will usually develop and can be seen on an x-ray. Finally, as the condition becomes worse, the pain may be present all the time and may even keep you awake at night.