fake tan with post inflammatory erythema?

Hi! I'm wondering about a few things:

I have post inflammatory erythema, would a fake tan on my face would make it darker/more prominent?
if it would make my PIE more prominent, what do you think about me just tanning my body and then finding a foundation shade that matches? I'm just worried that without foundation, I'm gonna look super silly, because I'm pale, my face is already paler than my body, so i may give off ghost vibes when I'm not wearing foundation. But I wear foundation everyday and only take it off when i'm home so i don't know..

thanks!