But the hallmark symptom of alcohol intolerance is flushing of the skin of the chest, neck and face. Symptoms of an alcohol allergy include rashes, itchiness, swelling and severe stomach cramps. Allergy symptoms are often more painful and uncomfortable than alcohol intolerance symptoms.
Alcohol intolerance can cause immediate, uncomfortable reactions after you drink alcohol. The most common signs and symptoms are stuffy nose and skin flushing. Alcohol intolerance is caused by a genetic condition in which the body can't break down alcohol efficiently.