all he has to do is stop bleaching his skin,, eventually it will return back, well,, usually,,
god only knows what he used, there are several techniques,,
I have a girlfreind who is black, and she has 8 inch white spots all over her body and face, and when she goes out, she litereally uses a brown/tan body paint, to put on her face/neck/chest,, it looks pretty decent for a coverup,
anyway, there are options for people that are wealthy as he is,,, and by the way, the only illnes he is batteling is the liver damage caused by shitty skin bleaches,,
just saying,