Like the other post said, you should see a dermatologist. Also, I would suggest some allergy testing as well.

My daughter has had eczema from birth and her doctor told me that alot of times people with eczema also had allergies and sensitivities to all sorts of things. It could be eczema on the scalp and it could be irritation from products.

I have seen firsthand how miserable this condition can be! I hope you get more posts with more answers for you.
Curltype:Fine, 2C underneath, Mostly 3A, with some 3B thrown in there. Normal porosity.
Shampoo: Elucence, clarify with sulfates 1x per month
Conditioner: Elucence MBC,
Products: Devacurl Angel, LALSG
I can't go totally CG as it weighs my hair down FAST. Hard water.
Bad haircut finally starting to grow out and look normal again!