[tauist]

I'm Italian and yes most Italians don't know what lactose intollerance is but when I went vegan (for the animals) I suggested veg milk to people and you will be surprised by how many of them felt better, they didn't know they are lactose intollerant and many of them didn't even realized they had a problem. Who could imagine a headache can be caused by milk?

[SeanLuke]

It's completely legitimate to go vegan for animal rights reasons. But lactose intolerance does not, and cannot, cause headaches. It is a specific disorder affecting the lower intestine and causes diarrhea and gas pain. I am afraid that your posting may be describing some other disorder (or it may be effectively another example of colpo d'aria).

*Edit: for those of you who don't know, colpo d'aria is a made-up disease used by Italian mothers to explain why their kids have to be bundled up ridiculously in order to go out in the cold: the closest term in English would be "catching your death". Italians are extraordinarily superstitious and hyperchondriacal about diseases and disorders. Frauds run rampant and homeopathy is openly advertised in drug stores as if it's real.

[mpol]

Headache from milk can come from the Vitamine A. You do need to drink about 2L of milk a day. I know this anecdotally, I head lots of headaches around the age of 21 :)