Facial flushing soon after drinking may be a sign of an alcohol allergy. Certain cancers have been connected to the alcohol flush reaction.
Hives are a common reaction among those who are allergic to alcohol. In the short time after taking alcohol, red, itchy welts emerge on the skin.
If a person has both asthma and an allergy to alcohol, their respiratory symptoms may increase. Up to one-third of asthma sufferers believe that drinking worsens their illness.
Frequently, alcohol allergies are accompanied by nasal congestion or runny nose. Alcoholic beverages cause an allergic reaction because they contain histamine.
In general, it is believed that alcohol raises blood pressure; however, those who are allergic or intolerant to alcohol may experience a reduction in blood pressure.
These symptoms may be confused with alcohol poisoning, but they may also suggest an allergy or intolerance.
Gastrointestinal symptoms such as stomach cramps and diarrhea are also associated with alcohol allergies and might begin immediately after your first drink.