What causes a blocked nose?

The nasal lining swells and narrows the air passages during a Common Cold, often alongside a runny nose or sore throat. Allergic Rhinitis can cause blockage with sneezing, itching, and watery discharge, while House Dust Mite Allergy may make symptoms worse indoors or during sleep. Sinusitis or Chronic Sinusitis can add facial pressure, reduced smell, thick discharge, or cough. A blocked nose at night with loud snoring, pauses in breathing, or morning tiredness may occur with Obstructive Sleep Apnoea. Irritants, dry air, and overuse of decongestant sprays can also worsen congestion.

Drink fluids, avoid smoke and known irritants, and try a saline nasal rinse or spray as directed. Wash bedding regularly if dust-mite allergy is suspected and keep a note of triggers, duration, discharge, smell, and sleep effects. Allergy Medication may help when an allergic pattern is confirmed or strongly suspected; ask a pharmacist or clinician which option is suitable. Do not use decongestant sprays longer than the product instructions, because rebound congestion can develop.

Arrange an assessment if blockage lasts beyond a typical cold, keeps returning, is mainly on one side, or affects smell, sleep, or breathing. Seek prompt care for severe facial swelling, intense headache, high fever with worsening symptoms, eye swelling, confusion, or breathing difficulty. Night-time pauses in breathing or choking deserve evaluation even when nasal blockage seems mild.

Ask whether your pattern fits allergy, sinus inflammation, infection, medication-related congestion, or a sleep-breathing problem. Ask how long to use nasal treatments, whether testing is useful, and which changes should prompt urgent review.