Objectives: To comprehend the different phenotypes of upper airway inflammation from childhood up to adolescence through epidemiologic data from pediatric population. Methodology: A birth cohort was used with 4090 children who had been followed from birth up to the 16 years of age. Questionnaires and clinical follow-ups were used for this purpose. Results: AR is common at 4 years of age (5.5%) and prevalence increased to 15% at 8 years. 88% of the 4-yearold kids showing AR had disease up to 9 years. In contrast to this, among the 8% with NAR at 4 years of age, 75% had no rhinitis symptoms at 8 years of age. It was also discovered that co-morbidity along with asthma and eczema was common for AR and NAR both. Conclusion: Both AR and NAR are common in children. They are associated with asthma and eczema and affected by parental allergy-related diseases. The prevalence of CRS in adolescence appears to be less but for those affected, the symptoms are troubling. [ABSTRACT FROM AUTHOR]