Regarding the allergic reaction to alcohol,it is usually not the alcohol that produces the allergic reaction to the wine or beer. The other
ingredients in the alcohol, such as yeast, sulfur dioxide, and additives are often the culprits. Beer may contain a variety of ingredients, including barley, corn, wheat, and rye that may precipitate an allergic reaction.
Since the allergens have not been identified in your case,so I would advise you to get allergy testing done.