I wonder if I might have discovered the “cause” of my CPH.  When I was 3 years old, I climbed a 6 ft. slide, and was too scared to go down it.  So while I was contemplating, these 2 big boys started yelling at me and they pushed me off.  I fell 6 ft down, landed on my right side, sprained my arm, and got a cucusion.  A few years later, I  started getting strange headaches, and my parents thought my eyes were going bad, so they took me to am Optomologist.  He gave me reading glasses.  They did not help.  My headaches went away on their own a few years later.  But then they came back when I was in my 20’s.  And now I finally know what kind of headache they are.   I read about other CPH sufferers having a previous head injury, so it makes me wonder if this might really be something.  I wish there was more info out there so we would not have to wonder.