The safest way to clear mucus from a baby’s throat is to thin it with saline drops and then gently suction it out with a bulb syringe or nasal aspirator. Babies breathe primarily through their noses and have narrow nasal passages, so even a small amount of mucus can make them sound congested, gurgly, or uncomfortable. They can’t blow their nose or cough effectively on their own, which means you need to do the work for them.
Why Babies Get So Congested
The most common causes of nasal and throat congestion in infants are viral upper respiratory infections and, less often, allergies. Because a baby’s airways are so small, a mild cold that would barely register in an adult can produce noisy breathing, rattling sounds in the throat, and visible discomfort during feeding or sleep. Reflux can also push stomach contents into the back of the throat, adding to the mucus buildup.
Babies under about four months old are “obligate nasal breathers,” meaning they rely almost entirely on their noses to get air. A stuffed nose doesn’t just annoy them; it can interfere with feeding and sleeping in ways that matter.
How to Use Saline Drops
Saline drops are the first step because they soften thick mucus so it’s easier to remove. You can buy premixed saline drops at any drugstore, or make your own by dissolving 1 teaspoon of non-iodized salt and 1 teaspoon of baking soda in 2 cups of distilled or previously boiled and cooled water. Use room-temperature or slightly warm liquid, never hot.
Lay your baby on their back with their head slightly tilted. Place two or three drops into each nostril and wait about 30 seconds. The saline will loosen the mucus so you can suction it out. You can repeat this two or three times a day.
Suctioning With a Bulb Syringe
After the saline has had a moment to work, pick up the bulb syringe. Squeeze all the air out of the bulb first, while it’s away from the baby’s face. Then gently place just the tip into one nostril. Release the bulb slowly. The suction will pull mucus out of the nose and into the bulb. Squeeze the contents onto a tissue, then repeat on the other side.
Limit suctioning to no more than four times per day. More frequent use can irritate the delicate lining of your baby’s nose, causing swelling that actually makes congestion worse. Gently wipe any mucus around the nostrils with a soft tissue to prevent skin irritation.
Powered nasal aspirators and parent-suction devices (where you create gentle suction through a tube with a filter) work on the same principle and are fine alternatives. The key rule is the same: don’t overdo it.
Humidity and Steam
Running a cool-mist humidifier in your baby’s room adds moisture to the air and helps keep mucus from drying out and thickening. Always use a cool-mist model, not a warm-mist humidifier or steam vaporizer. Hot water or steam can burn a child who gets too close, and spills are a real risk. Clean the humidifier daily by emptying the tank and drying all surfaces to prevent mold and bacteria growth. Using distilled or purified water reduces mineral buildup.
Another option is sitting in the bathroom with your baby while a hot shower runs and the room fills with steam. Five to ten minutes of breathing that warm, moist air can loosen mucus enough to make suctioning more effective. Just hold the baby away from the hot water itself.
What Not to Do
Do not give over-the-counter cough or cold medicine to any child under two years old. The FDA warns that these products can cause serious side effects in infants, including dangerously slowed breathing. Manufacturers now voluntarily label cough and cold products with a warning against use in children under four. This includes homeopathic cough and cold products.
Do not use sleep wedges, inclined positioners, or pillows to prop your baby’s head up during sleep. These devices have not been shown to help with congestion, and in some cases they have contributed to infant deaths. Babies should always sleep on a firm, flat surface with nothing else in the crib.
Congestion vs. Choking
A congested baby sounds noisy but can still cry, cough, and breathe. True choking from an object blocking the airway looks different. The danger signs are an inability to cry or make sound, weak or silent coughing, high-pitched sounds while trying to inhale, skin turning bluish, and visible chest retractions where the ribs pull inward with each breath. If your baby is coughing forcefully or crying loudly, the airway is not fully blocked, and those reflexes may clear the obstruction on their own. If you see the silent, struggling signs of a true blockage, that’s a call for infant choking first aid, not suctioning.
Signs That Need Medical Attention
For babies three months old or younger, any nasal or chest congestion warrants a call to your pediatrician. Their airways are small enough that even routine congestion deserves professional guidance.
For babies older than four months, watch for these specific thresholds:
- Thick nasal discharge lasting more than 10 days, which may signal a sinus infection rather than a simple cold
- Fever above 100.4°F for more than 24 hours in a child under two
- Fever that repeatedly reaches 104°F or higher
At any age, signs of respiratory distress need prompt attention. These include nasal flaring (the nostrils widening visibly with each breath), retractions (the skin between or below the ribs pulling inward), grunting sounds at the end of each breath, and wheezing. These are signs your baby is working much harder than normal to breathe, and home suctioning won’t be enough.