[Pansy-Mae]

I can't give you a straight answer because it isn't a problem I've had - I have the opposite, my skin has gone unpleasantly dry ( not flaking, just dry)
However I think you'll find the answer is too much E, i.e too much PM or an imbalance between E and the P's. I'm sure I've read about that on Isabelle's mega-thread ( Long time Hops...etc) so you might want to go to that and do a search.