Beer consumption may contribute to canker sore outbreaks due to several factors:

Alcohol Content

Alcohol in beer can irritate the delicate tissue inside the mouth, leading to the formation of sores in susceptible individuals.

Acidity

Beer is slightly acidic, which can aggravate sensitive oral tissues or existing sores, making them more prone to developing canker sores.

Nutritional Deficiencies

Heavy or frequent alcohol consumption might interfere with the absorption of key nutrients (e.g., vitamin B12, zinc, or folate) that play a role in maintaining oral health.

Allergens

Beer can contain allergens (like barley, wheat, or hops), which may trigger an immune response in people with allergies or sensitivities.

Gluten

People with sensitivities to yeast or gluten (e.g., celiac disease or non-celiac gluten sensitivity) may develop inflammation or canker sores as a reaction.