[tacticalogic]

Quitting caffeine was far more difficult, I honestly thought the pain of the headaches was going to kill me. Of course no one ever talks about caffeine "addiction."

Caffeine is a vaso-constrictor. When it wears off the rebound can cause swelling of blood vessels in your brain, like you get with an alcohol hangover.

[Gabz]

When it wears off the rebound can cause swelling of blood vessels in your brain, like you get with an alcohol hangover.

I haven't had an alcohol hangover in almost 25 years, (the morning after my divorce was final in 1988) but I had totally forgotten about how bad a caffeine "hangover" could be.