Both my forehead and scalp are oily and itch, same with my nose, but the rest of my face is smooth and clean. I have always had oily forehead, nose and hair though, even before male pattern baldness.
But before male pattern baldness my skin used to be more greasy than oily, meaning I could actually wipe off liquid grease from my forehead with a paper towel. back then my forehead skin was smooth and rarely itched. Now there isn't liquid grease but rather my skin just feels oily and has a rough texture and a mild red hue.
I never had acne as a teenager. So I don't know whats up.