RA can affect almost any joint in the body and often symmetrical, which means that if the arthritis in particular the other side of the body, it is also likely that the AR very common on the other side of his body. OA can cause problems moving joints and sometimes develop a disability, if these areas are back, knees or hips. OA can also cause stiffness in the days when there is no specific route is used when, as if you’re a long car journey, but the stiffness usually goes away when you move your joints again.