I have been wishing for a new hat lately, but not a compression hat! :}
Since we have a hard skull up there, yes, we are all hard heads, compression hats wouldn't serve much purpose except for being stylish.
However, applying heat does help! Heat thins the blood, not in the entire body, but just to the specific area. I get headaches in the back and top of my head, and have neck and back aches.
I am just coming out of my fifth exacerbation, and it is the most mild of all. I believe it is because of my knowledge of CCSVI, and the choices that I have made because of this knowledge.
When my neck and back would hurt, and the headaches started, I applied heat to those areas. We're talking MAJOR headaches, like emergency room headaches that meds would not touch. The pain would subside within minutes!
You see, we made our own heat pads by filling cloth with rice, and heating it in the microwave.
Well, I have been asking my kids to make me a "heat hat".

Seriously.