Why do I have headache after drinking a wine?

Q. Why do I have headache after drinking a wine?
A.
I was in Paris and tasted some red and white wine. I was surprised that there was no any headache with any wine. Now I understand why I have headache after drinking any wine in US? The answer is simple: any US wine has chemical preservative sulfites.
I've found online that the biggest complaint about sulfites is the side effect of headaches.
My advice is if you don't want the side effect from sulfites drink organic wine or go to Europe (France, Italy, Spain).