What is causing skin behind my right ear and along the hairline of my face to be rashy and then scaly?

Besides a myriad of possibilities with skin problems,I would first try medicated soaps,or maybe a visit to a dermatologist,if that would make you feel better.

I have this also,I think at some point most do in one way or another.

Fostex medicated soap was the one I have used in the distant past,, I am not sure if it is still on the market as it has been that long,though.

Today I still have limited issues, it's the winter time and the moisture levels in this dry-bed of a home are lacking..

Look also at the ads on this post,Skin rash Pictures,Dermarest lotion,etc,they just might have the answers there,, cool feature of AMHD.