Why does obstructive sleep apnoea cause blocked nose?

The nose warms, filters, and humidifies incoming air. When its lining is swollen from allergy, infection, irritants, or structural narrowing, breathing through the nose takes more effort. People may then breathe through the mouth, which can dry the throat and aggravate snoring. Blocked Nose is a common presentation of Obstructive Sleep Apnoea, although congestion itself has many possible causes and does not diagnose a sleep disorder. Repeated throat narrowing remains the central feature of obstructive sleep apnoea.

Tell a clinician if congestion is persistent, seasonal, one-sided, or associated with facial pain, reduced smell, or nosebleeds. Note snoring, gasping, witnessed breathing pauses, morning headaches, and daytime sleepiness as well. Saline rinses or sprays may help some people clear mucus; use clean water and follow product instructions. A pharmacist or clinician can advise whether allergy treatment or a nasal medicine is suitable, especially if you have other medical conditions.

Seek urgent care for severe breathing difficulty, swelling of the face or throat, blue lips, confusion, or an injury causing a visibly deformed nose. Arrange prompt review for a blocked nose that is only on one side and persists, repeated nosebleeds, high fever with facial swelling, or sleep symptoms that leave you dangerously sleepy while driving or working.

Ask whether allergies, a deviated nasal septum, sinus disease, or medicine overuse could be causing the blockage. Discuss whether your sleep symptoms warrant a sleep study and how nasal treatment might fit alongside treatment for obstructive sleep apnoea.