Hives from Drinking Alcohol: What to Know

Alcohol may widen blood vessels and make redness or warmth more noticeable, while hives are raised itchy welts caused by skin mediator release. The trigger may instead be an ingredient such as grains, grapes, hops, preservatives or flavourings. Alcohol can also aggravate an existing tendency to hives, making another trigger harder to recognise. Swelling around the lips, eyes or face may occur with hives and is called angioedema.

Keep the label or name of the drink, note the amount and timing, and record foods, medicines and exercise around the episode. A reaction to one drink does not identify the responsible ingredient by itself.

Stop drinking when symptoms begin and avoid testing the suspected drink again until you have medical advice. Sip water, cool the skin and avoid overheating. Ask a pharmacist whether an oral antihistamine is appropriate; alcohol can add to drowsiness from some medicines, so follow specific advice and label warnings. Do not use alcohol to take a medicine unless a clinician or pharmacist says it is safe.

Call emergency services for breathing difficulty, wheezing, throat tightness, faintness, or tongue swelling. Seek urgent assessment for rapidly worsening facial swelling, repeated vomiting or severe weakness. Arrange a clinician review for recurrent reactions, hives after small exposures, or uncertainty about whether a medicine or drink ingredient is responsible.

Could the reaction be related to alcohol itself or an ingredient? Should I avoid all alcoholic drinks while this is assessed? Is an antihistamine safe with my current medicines? What emergency symptoms should I explain to people around me?