Morning nasal congestion that is at its worst on waking and gradually improves over the first hour or two of the day is one of the most consistent clinical patterns of house dust mite allergic rhinitis - and house dust mite is the dominant perennial allergen in Chennai's humid coastal climate. The explanation is straightforward: house dust mite concentrations are highest in the bedroom environment - the mattress, pillows, and bedding where mites live and reproduce - and the overnight period of sleep is the longest sustained allergen exposure a sensitised patient experiences. Waking congestion reflects the accumulated nasal mucosal inflammation from those hours of exposure, and the improvement through the day reflects movement to lower-allergen environments and the natural diurnal variation in nasal airway congestion. If your morning congestion follows this pattern and is accompanied by sneezing, nasal itch, and a clear runny nose, allergic rhinitis from house dust mite sensitisation is the most likely diagnosis and allergy testing will confirm it. If the congestion is more constant throughout the day, present without sneezing or itch, and associated with difficulty breathing through the nose on a persistent basis, a structural component - deviated nasal septum, inferior turbinate hypertrophy, or nasal polyps - may be contributing alongside or instead of allergy. As both an ENT surgeon and an allergy fellowship-trained clinician, I assess both dimensions at the same consultation: nasal endoscopy evaluates the anatomy while allergy testing evaluates the immune sensitisation, giving a complete picture of what is driving each patient's nasal obstruction.
Written by Dr. Janani Marianne A, MS ENT, DNB ENT, Consultant ENT Surgeon and Allergy Disorders Specialist, Fellowship in Allergy, Asthma and Immunotherapy, Fellowship in Rhinology, Sri Hospitals, Tondiarpet and Royal Pearl ENT Clinic and Hospital, Thiruvanmiyur, Chennai. Fluent in English, Telugu, Tamil, and German. 10 years clinical experience. Phone: +91 9626482592.
