Dr. Dixit Kumar Thakur explains that chronic nasal congestion from allergic rhinitis forces mouth breathing during sleep, removing the structural support the nose provides to the upper airway. This dramatically increases the likelihood of airway collapse and sleep apnea episodes. As the best allergy doctor in South Delhi, Dr. Thakur treats nasal allergy and sleep apnea together at Pulmovista Clinics for comprehensive, lasting improvement in nighttime breathing.