Blocked nose when lying down: what to know

Lying flat can make congestion more noticeable, especially if one side of the nose is already narrower. Dust, pet particles, smoke, perfume or dry air may irritate the lining. Allergic rhinitis often causes congestion with itching, sneezing or watery discharge; house dust mite allergy can be worse in the bedroom. A cold or sinusitis may add facial pressure, coloured mucus, cough or reduced smell. Night-time blockage with loud snoring, gasping or witnessed pauses in breathing deserves assessment because obstructive sleep apnoea can affect sleep and breathing.

Try saline nasal spray or rinse, following the product directions and using safe prepared water for a rinse. Keep the bedroom free from smoke and strong fragrances, wash bedding regularly, and reduce dust where possible. Drinking fluids can keep secretions less thick. Raising the head of the bed slightly may make breathing more comfortable. A pharmacist or clinician can advise whether allergy medication or another treatment fits your symptoms; avoid using decongestant nasal sprays for longer than the label allows because overuse can worsen congestion.

Arrange a medical review if blockage keeps returning, lasts beyond a short illness, affects sleep, or stays mainly on one side. Seek urgent care for severe breathing difficulty, swelling around the eyes, confusion, a severe headache with fever, or a nose injury with heavy bleeding. A clinician can examine the nose and ask about triggers, medicines and sleep symptoms.

Could allergies, sinus inflammation or a structural narrowing explain the night-time pattern? Which spray or rinse is suitable for me? What symptoms would mean I should seek urgent care?