What can cause allergic reactions?

Allergic reactions can be triggered through multiple routes of exposure, primarily through inhalation, ingestion, or direct contact with allergens. This comprehensive approach recognizes that individuals may come into contact with allergens in various ways, not just through food but also through the air they breathe or skin contact. For example, someone might experience allergic symptoms from inhaling pollen, consuming nuts, or touching a surface that has come into contact with a food allergen.

This broad understanding of potential exposure pathways is vital in contexts such as food service or healthcare, where allergen management is crucial for the safety of individuals with allergies.