Mysterious rash on face and scalp

[Freeman_James]

Help me diagnose what this is please. It's red, slightly bumpy, but does not itch or burn or anything. It seems to flare up randomly. Sometimes it flakes and if I scratch it off, it's red and sore-looking underneath. It's mainly near my hairline, under my beard and mustache, and in my scalp. A little bit in between my eyebrows as well. Sometimes it's barely there, but I took some photos when it was really bad. You can see the flaking in the beard.

[Cookie]

Looks like it could be seborrheic dermatitis.

[d0ug]

Check out a possible gluten intolerance. Gluten intolerance will give you the same rash.