How are you? Intake of beer may lead to instant flush, nasal congestion or hives. A beer allergy or intolerance can be caused by alteration in the Aldehyde Dehydrogenase (ALDH) gene; food allergy such as beer components malted barley, hops and yeast; and allergy to alcohol itself. If you experience the symptoms mentioned, it is best that you check with your doctor for proper evaluation. An allergy test may help identify the specific allergen that should be avoided. Take care and regards.
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