Oh. I think I have a sensitivity to caffeine, because drinking coffee causes an onset of a migraine that I don't like when I'm writing code or managing systems.

Caffeine headaches? You mean the headaches that people get when they try and take away my caffeine and I hit them in the head?

Typically caffeine headaches occur when you stop drinking it.

Some people get a caffeine headache in the morning because they haven't been drinking it while they were asleep.

Yes. Only, I have never been a habitual drinker of coffee. When I started drinking regularly for a short period, I stopped once I noticed the pattern. For me, cheese and chocolate, as well, triggers a migraine.

Chocolate of course has theobromine, similar to caffeine with similar effects. Cheese? Any idea why that might be similar?

Tyramine? Tyramine could be the cause of headaches, especially if MAOIs are involved.

I have felt that certain dairy products do trigger the migraine. However, milk itself doesn't cause it. I also drink milked-tea regularly without any headaches/migraines.

An interesting hypothesis, undermined if the coffee was black.