The reason I asked is I have really pecular dry skin issues. My lips chap, make plates, crack and bleed. The corners of my mouth crack and bleed. My knuckles get really dry and bleed. Top of hands and fingers get red and those pores get really red and inflammed. My face gets dry and really tight feeling. On my face and other places I get this ash/powder looking stuff (dead skin..). Most of this happens in the months around winter. This happens despite drinking tons of water and using cream. Lips have always been that way, but the other stuff has been gradually getting worse since age 25 (I'm 36). I read that CF causes a problem of fluid transfering in and out of the cells.. which tells me that cells can get really dehydrated.