When I was diagnosed and put on Humira, I asked if it would help with my constant fatigue. My doc told me something like - You have a lot of TNF alpha, which is what we see high levels of in cancer patients and makes you feel crappy. The Humira should bring those levels down, which should help.
In any case, I haven't noticed feeling less fatigued since starting it.
I guess it depends on the real cause of your fatigue.
It won't get rid of your scar tissue but the hope is that it will control the inflammation that causes the scar tissue so you won't get any more. Good luck.