Why does my nose block when I lie down at night?

Short answer: A nose that blocks up when you lie down is very common. Lying flat lets more blood collect in the lining of the nose, so the tissue inside swells slightly. If something is already narrowing your nasal passage, that small extra swelling can be enough to block it.

What happens when you lie down

The inside of your nose is lined with soft, spongy tissue, including the turbinates, which warm and humidify the air you breathe. When you are upright, gravity helps blood drain away from this tissue. When you lie down, it fills a little more and the airway becomes narrower.

Your nose also goes through a natural nasal cycle, where one side is slightly more congested than the other and the sides switch every few hours. Lying on your side tends to congest the lower nostril, which is why many people notice that the side they sleep on is the one that blocks.

Common reasons it gets worse at night

• Allergies: dust mites in pillows, mattresses and bedding are a frequent trigger in Bengaluru homes.
• A deviated septum: when the wall between the two nostrils is bent, one side is already narrow before any swelling starts.
• Enlarged turbinates: long-standing allergy or irritation can make this tissue stay swollen.
• Sinus inflammation or nasal polyps: these can cause blockage, mucus at the back of the throat and a reduced sense of smell.
• Overuse of decongestant nasal sprays: using them for more than a few days in a row can cause rebound blockage that is worse than before.
• Acid reflux: stomach acid rising at night can irritate the throat and nose.

Simple things that may help

• Raise the head end of your bed slightly, or use an extra pillow.
• Rinse your nose with saline before bed.
• Wash pillow covers and bedsheets regularly in hot water, and keep the bedroom dust-free.
• Avoid using decongestant sprays for longer than your doctor advises.
• Avoid heavy meals late at night if you have reflux symptoms.

When to see an ENT specialist

Consider an ENT check-up if your nose blocks most nights for more than a few weeks, if the blockage is always on one side, or if it comes with snoring, mouth breathing, waking up tired, a dry mouth in the morning, nosebleeds, facial pain or loss of smell. A nasal endoscopy in the clinic can show what is narrowing the airway, and treatment depends on the cause.

This article is for general education and is not a substitute for a consultation. Please see a qualified doctor for advice about your own symptoms.