Key TakeawaysAllergens trigger immune system reactions in sensitive individuals.Irritants affect the nose, throat, and airways without involving an allergic immune response.Air pollutants are contaminants in the environment that may worsen respiratory symptoms and contribute to long-term health concerns.Identifying whether symptoms are caused by allergens, irritants, or pollutants can influence management strategies.An ENT specialist or nose allergy specialist may assess persistent nasal symptoms to determine their underlying cause.IntroductionMany people associate sneezing, a blocked nose, or watery…