it is an alergic reaction does it happen when you drink liquor but you probably allergic to something in the beer
I had a friend who used to do that also . He said it was an allergy . After a while his face would turn to red rash . He drank any way . Bill
from foodreactions.com: "Alcoholic beverages are complex. As well as ethanol, alcoholic beverages contain a complex mixture of grape, yeast, hop, barley or wheat-derived substances, natural food chemicals (e.g.. salicylates), wood-derived substances or preservatives like sodium metabisulphite. Furthermore, "fining agents" may be used to remove particulate matter. These include the use of egg protein in some wines or seafood proteins to fine some beers."
Do you have a known allergy to any of the ingredients in beer, perhaps?