Why does red wine give me headache?

Happens sometimes. May be due to your blood vessels in the head dialate causing the headache. Or some ingredient in the wine may be attritubale to your headache. Difficult to answer.

Related Questions

I think im allergic to red wine. Get headaches.?

Not allergy. Headache is not an allergic symptom. This is a common side effect of red wine. There is no way to treat this to prevent the headache; all you can do is avoid drinking it. Read more...
Not a true allergy. Red wine can trigger headaches by affecting blood vessels. It is not an allergic reaction as it is due to a non-immune mechanism, but you would still want to avoid it. Read more...

I keep getting severe headaches every night at the same time after having a glass of red wine and dinner?

It's a migraine. Wine is a common migraine trigger. Cluster headaches are also triggered by alcohol and often occur at the same time every night, but they usually start immediately after ingesting alcohol. Sulfites occur naturally, but are also added to wine as a preservative and are at least in part are responsible for headaches. Vodka is less likely to cause headaches because it is pure alcohol, but it also can. Read more...