Soap, Hard water, weather, stress among a bunch of other things can cause dry skin. I'm sure proviron could cause it as well. Every body reacts different to different things. Dry skin is hard to pin point what's causing it because so many things other than drugs can cause it. To be positive it is or isn't the proviron don't change anything else except cut the proviron out of the picture. If it goes away the it is, if it doesn't then it's something else.