Yes — and this is one of the most underdiagnosed connections in respiratory medicine. Summer allergens like pollen, dust, and mould trigger nasal inflammation that blocks airflow, forces mouth breathing during sleep, and narrows the upper airway to the point of collapse. Dr. Dixit Kumar Thakur at PulmoVista Clinics treats patients with allergy-triggered sleep apnea every summer in Delhi, and considers proper allergy management the essential first step in any sleep apnea treatment plan.