You can’t always stop a baby’s runny nose quickly, but you can clear the mucus, keep your baby comfortable, and help them breathe easier while the cause resolves. Most infant runny noses are caused by common colds, and the congestion typically lasts 7 to 10 days. The most effective tools you have at home are saline drops, gentle suction, humidity, and extra fluids.
Clear Mucus With Saline and Suction
Saline nasal drops are the single most useful tool for a stuffy, runny baby nose. They thin out thick mucus so it’s easier to remove. You can buy saline drops at any pharmacy, or make your own by dissolving a quarter teaspoon of table salt in one cup of warm (not hot) tap water. Make a fresh batch each day.
To use them, lay your baby on their back and place 3 to 4 drops into each nostril with a dropper. Hold your baby’s head back for about a minute to let the saline work. Your baby will probably sneeze, which actually helps move mucus out.
After the saline has had a minute to loosen things up, use a bulb syringe or nasal aspirator to suction the mucus out. Squeeze all the air out of the bulb first, then gently place the tip into one nostril. Release the bulb slowly so it draws mucus in. Squeeze the mucus onto a tissue, then repeat on the other side. Limit suctioning to four times a day or less, because overdoing it can irritate the delicate lining of your baby’s nose and actually make congestion worse.
One important timing note: always do saline and suction before feeding, not after. Suctioning on a full stomach can trigger vomiting.
Add Moisture to the Air
Dry air thickens mucus and makes congestion feel worse. Running a humidifier in your baby’s room adds moisture that helps loosen secretions, calm irritated nasal passages, and ease coughing. The American Academy of Pediatrics recommends a cool mist humidifier rather than a warm mist vaporizer, because vaporizers boil water and can cause burns if a child tips one over or gets too close to the steam.
Humidifiers do require regular cleaning. Bacteria and mold grow easily in standing water, which would defeat the purpose. Empty the water tank and dry the interior surfaces every time you turn the machine off, refill with fresh water daily, and do a thorough cleaning every two to three days.
A steamy bathroom works as a short-term alternative. Run a hot shower with the door closed for a few minutes, then sit in the room with your baby (not in the shower) and let them breathe the warm, moist air for 10 to 15 minutes.
Keep Your Baby Well Hydrated
Fluids help thin mucus from the inside. For babies under six months, that means breast milk or formula. For older babies already eating solids, you can also offer small amounts of water. Frequent, shorter feedings often work better than longer ones when a baby is congested, since breathing through a stuffed nose while eating is exhausting.
Watch for signs that your baby isn’t getting enough fluids. Fewer wet diapers than usual, sunken eyes, a sunken soft spot on top of the head, and few or no tears when crying all point to dehydration. If you notice any of these, contact your pediatrician promptly.
What Not to Give Your Baby
It’s tempting to reach for over-the-counter cold medicine, but the FDA does not recommend cough and cold products for children under 2 years old because of the risk of serious, potentially life-threatening side effects. Manufacturers voluntarily label these products with a warning not to use them in children under 4. The FDA has also cautioned against homeopathic cough and cold products for children younger than 4, noting no proven benefits.
Never give honey to a baby under 12 months. Honey can contain spores that cause infant botulism, a rare but dangerous illness. This includes honey-filled pacifiers and honey-based “natural” remedies. Menthol rubs designed for adults are also not safe for infants, as they can irritate airways and make breathing harder.
Safe Sleep With a Stuffy Nose
You may have heard that elevating one end of the crib mattress helps a congested baby breathe. The AAP’s safe sleep guidelines are clear: babies should sleep on a firm, flat mattress with only a fitted sheet. No wedges, pillows, rolled towels, or inclined surfaces. These increase the risk of suffocation and positional asphyxia. Instead, do a saline and suction session right before bedtime and run a cool mist humidifier in the room overnight.
Other Ways to Ease Congestion
Holding your baby upright during the day helps mucus drain naturally. Babywearing in a carrier or simply holding your baby against your chest in an upright position can make a noticeable difference in how easily they breathe. Gently wiping the nose with a soft tissue and applying a small amount of petroleum jelly to the skin around the nostrils prevents the raw, red irritation that comes from constant wiping.
Signs That Need Medical Attention
Most runny noses resolve on their own, but certain signs point to something more serious. Call your pediatrician right away if your baby is younger than 3 months and has any fever at all. For babies 3 to 6 months old, a temperature of 100.4°F (38°C) or higher warrants a call. For babies 6 to 24 months, a fever above 100.4°F that lasts longer than one day needs attention.
Beyond fever, watch your baby’s breathing pattern. Nasal flaring, where the nostrils visibly widen with each breath, is a sign of respiratory distress in young infants. So is skin pulling inward around the ribs, stomach, or collarbones during breathing. Wheezing, persistent grunting, or breathing that looks like it takes real effort are all reasons to seek care quickly. A runny nose that lasts longer than 10 to 14 days, produces thick green or yellow discharge for more than a few days, or is accompanied by ear pulling and increased fussiness may indicate a secondary infection like sinusitis or an ear infection that needs treatment.