Older braces will start to become uncomfortable because the cushioning properties of the padding system as well as the straps are worn out from normal wear and tear. Replacement straps and pads are available for purchase as needed.
If your brace has been used for over two years it may need replacing. In most cases as the brace ages the hinge area will begin to loosen and reduce the overall amount of support provided by the brace.
To test the hinge in your brace, place one hand on the top of the brace and the other hand on the bottom of the brace and push and pull the brace back and forth. If it seems like there is a lot of movement in the hinge area, then replacing the brace is recommended to regain stability.