You need to talk to your doctor first and foremost. Scar tissue can cause pain as you grow if you have scar tissue from an operation. If you had to take large doses of steroids, they can effect growth, but at 16, there is no way to say your growth has been ‘stunted’. Some boys don’t get their growth spurt until 18 – 21. I would absolutely talk to your doctor more about the pain you are feeling and undergo a full check up.