Unfortunately, except for truly drastic (and incredibly painful) surgery, there really isn't much of anything that can be done at your age. So it's best to accept what you have. If you can walk and move reasonably well, you're ahead of the game, and way better off than people who are paralyzed or disabled in other ways. Everyone has things about their appearance that they wish they could change. But most of the time there's nothing. So it's best to accept it and go on.