the best way to know if your allergic to something is a test called skin prick test.. it is a test in which common allergens are introduced on your skin..if you r allergic you will develop rash
on tat area.. this test is done by immunologist or allergy
specialist.. once you know you allergic to something you can avoid it..
a person be allergic to anything..if your symptoms repeatedly happen after drinking beer you may be allergic to beer..
beer is made from wheat and other cereals ..also flour used in dough is made from wheat or other cereals.. therefore you get your allergy test done for food items .. then you vl be guided by the allergy specialist.