What've you tried?
EDIT: Says here milk baths can help. some topical cream called Adapalene also does too. E II: oh Adapalene is Epiduo. ok.
also says that coconut oil on the affected area while showering helps and so does "moderate sunlight". I assume you don't pick or scratch at it b/c that makes it worse.
E III: exfoliating helps too. but really I'm just throwing s**t out there until I know what you've tried so far.
E IV: straight from Xiporah (check my comments):
Quote:
Best thing for it is to scrub using a loofah every day.