Know your enemy and the pathophysiology.Caffeine is a powerful drug vets warn that there is enough caffeine in a chocolate bar to kill some dogs
Caffeine is a vasoconstrictor it causes the capillaries in your brain to shrink.When you cease the drug the vessels expand and press on nerve endings,causing the headaches.
200 mg 12 oz is considered the adult dose limit we all drink WAY to much (I do).
Cut down gradually and switch to decaff.
Lots a luck