Why newborns get stuffy
Babies are “obligate nasal breathers” for the first months: they breathe mainly through the nose, and their nasal passages are only a few millimetres wide, so a small amount of mucus or swelling causes noisy breathing. Dry air from heating, normal secretions, milk reflux, a cold virus and exposure to smoke or dust are the usual triggers. Newborns also sneeze often to clear the nose; this is normal.
Common causes
- Normal newborn nasal secretions and mild congestion, which are present in the first weeks.
- Common cold: clear or coloured discharge with sneezing, cough or mild fever.
- Dry air or irritants such as smoke, perfume and dust.
- Milk or reflux reaching the back of the nose.
- Allergy is uncommon in the first months.
- Structural problems: choanal atresia (blockage at the back of the nose) is rare, causes severe breathing difficulty at birth and requires urgent care.
- Infections, including RSV and bronchiolitis, with cough, rapid breathing and poor feeding.
Safe ways to relieve congestion
- Saline drops or spray: 1–2 drops in each nostril, wait a few seconds to loosen the mucus.
- Gentle suction: use a bulb syringe or a nasal aspirator after saline; do not insert deeply or suction too often (no more than a few times a day) to avoid irritation.
- Humidifier: a cool-mist humidifier in the room, cleaned daily; avoid hot steam vaporisers which can cause burns.
- Warm bath or steamy bathroom for a few minutes while you stay with your baby.
- Keep the baby upright for 20–30 minutes after feeds.
- Offer small, frequent feeds, since feeding is harder when breathing is noisy.
- Keep the room smoke-free and avoid strong smells.
Safe sleep with a blocked nose
Always place your baby on the back to sleep, on a firm, flat surface, with no pillows, bumpers or soft toys. Do not raise the head of the crib or use wedges, positioners or inclined sleepers: they are not recommended and have been linked to infant deaths. A humidifier and saline before sleep are safe measures. If the congestion makes sleeping or feeding difficult, call your doctor.
What to avoid
- Over-the-counter cold and cough medicines in babies and young children: they are not effective and can be harmful.
- Decongestant nose drops or sprays (oxymetazoline and others): unsafe in babies.
- Honey in babies under one year (botulism risk).
- Essential oils, menthol rubs and camphor on or near a baby’s face: can irritate and cause breathing problems.
- Overuse of suction, which can cause swelling and bleeding.
- Cotton buds in the nose.
- Smoking around the baby.
When it is a cold or a more serious infection
A newborn’s cold usually brings a runny or blocked nose, sneezing, mild cough and slightly reduced feeding for several days. Colds are generally mild but can be more serious in babies under 3 months. Bronchiolitis, often caused by RSV, begins like a cold but progresses to rapid, laboured breathing, wheezing and difficulty feeding, and may need hospital care. Signs of worsening should prompt a call to the doctor or an emergency visit.
When to call the doctor
- Any fever of 38 °C or more in a baby under three months (urgent).
- Fast breathing, chest or rib retraction, flaring nostrils or grunting.
- Poor feeding or fewer wet nappies.
- Blue or pale colour around the lips or face.
- Congestion lasting more than 10–14 days or worsening.
- Noisy breathing that is constant, or a high-pitched sound when breathing in (stridor).
- Persistent one-sided blockage, or thick green discharge with fever.
Preventing colds and keeping air clean
- Wash hands before touching the baby; ask visitors to do the same.
- Avoid contact with people who are unwell.
- Breastfeeding provides some protection against respiratory infections.
- Keep the home smoke-free and well ventilated.
- Follow the vaccination schedule, including pertussis and flu vaccination for caregivers.
- Clean humidifiers regularly.
Three common situations
Noisy breathing and sneezing in a thriving newborn: typical; saline drops, humid air and reassurance.
Stuffy nose and trouble feeding at night: saline and gentle suction before feeds, offer smaller feeds more often.
Stuffy nose with fast breathing and fever: seek urgent medical care.
Key points to remember
Newborn congestion is usually harmless. Use saline and gentle suction, humidify and keep the baby upright after feeds. Avoid medicines and strong smells, and know the warning signs that mean you should seek medical help quickly.
This guide is for general information and does not replace an assessment by your own doctor or ENT specialist.
Questions about newborn nasal congestion
These answers are general information and do not replace an examination or individual medical advice.
Why does my newborn sound congested but has no mucus?
Very small nasal passages and dry air can make breathing noisy even without visible mucus.
Can I use saline drops in a newborn?
Yes, 1–2 drops per nostril are safe and often helpful, followed by gentle suction if needed.
Is it safe to use a humidifier?
Yes, a clean cool-mist humidifier is safe; avoid hot steam vaporisers.
Should I elevate the baby’s head in the crib?
No. Keep the baby on a flat, firm surface for sleep; do not use wedges or inclined sleepers.
When is newborn congestion an emergency?
With fast or laboured breathing, blue colour, poor feeding, or fever in a baby under three months.
How long does it last?
Often days to a couple of weeks with a cold; mild stuffiness can persist on and off for the first months.
Sources
- NHS · Common cold
- NHS · Colds and flu in babies and children (cold and cough in babies)
- NHS · Sinusitis (sinus infection)
- AAO-HNSF · Clinical practice guideline: Allergic rhinitis (update), 2015
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.