Use an infant nasal bulb, or aspirator, to suck mucus from your baby's nose. It's OK to use nasal saline to loosen the mucus. If your child is able, have them blow their nose regularly. Never use a cold or cough medicine in kids under age 4 unless a pediatrician suggests it.

In older babies, nasal congestion or stuffy nose happens when the tissues inside the nose swell, usually from a viral upper respiratory infection (cold). Use salt water nasal drops or an infant nasal aspirator or suction bulb to help clear mucus from your baby's nose. If your baby has trouble breathing, see their health-care provider right away.

Congestion is common in babies because their nasal passages are still small. It can cause a stuffy nose and noisy or rapid breathing. Possible causes include allergens and dust. It does not usually need treatment, but home remedies may help.

Stuffed-up noses are caused by inflammation of the sensitive membranes that line the nasal cavity, and they’re usually nothing to worry about. Congestion in newborn babies is common, even when there's nothing wrong — the mucus in her system means her immune system is developing.