Abstract
INTRODUCTION-Nasal airflow is greater in one nostril than in the other because of transient asymmetric nasal passage obstruction by erectile tissue. The extent of obstruction alternates across nostrils with periodicity referred to as the nasal cycle. The nasal cycle is related to autonomic arousal and is indicative of asymmetry in brain function. The main hormone to affect the nasal mucosa is adrenaline and its analogues. However both male and female sex hormones are seen to affect the nasal mucosa with increased levels of nasal secretion and congestion seen in puberty, pregnancy and with menstruation. Early oestrogen rich oral contraceptive pills were seen to cause nasal congestion and squamous metaplasia was seen in the nasal mucosa.This study was designed to know about the role of different hormones acting on nasal mucosa and nasal cycle. KEYWORDS-PEF(peak expiratory flow),allergic rhinitis,pregnancy rhinitis,nasal congestion,NOSE score
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