Most baby coughs are caused by common viruses and will clear up on their own within one to two weeks. Since over-the-counter cough medicines are not safe for young children, your main tools are simple comfort measures: keeping your baby hydrated, loosening mucus, and adding moisture to the air. These steps won’t stop the cough instantly, but they help your baby breathe easier and recover faster.
Why You Can’t Give Cough Medicine
The FDA does not recommend over-the-counter cough and cold medicines for children younger than 2, citing serious and potentially life-threatening side effects. Manufacturers have voluntarily added labels stating these products should not be used in children under 4. This applies to homeopathic cough and cold products as well. Systematic reviews have found that OTC cough medications provide little to no benefit for acute cough in children, and the American Academy of Pediatrics has specifically advised against common cough suppressants for any type of pediatric cough.
Honey is a well-known cough soother for older kids and adults, but it is off-limits for babies under 12 months. A baby’s gut isn’t mature enough to handle bacterial spores that can be present in honey. Those spores can grow in the intestines and produce a dangerous toxin that causes infant botulism.
Keep Your Baby Hydrated
When your baby drinks enough fluids, the mucus their body produces stays thinner and is easier to cough up. For babies under 6 months, that means offering breast milk or formula more frequently than usual. Babies over 6 months can also have small sips of water between feedings.
Watch for signs of dehydration: fewer wet diapers than normal, a dry mouth, no tears when crying, or unusual sleepiness. If your baby’s wet diaper count drops noticeably, that’s a signal to increase fluids and contact your pediatrician.
Clear Mucus With Saline and Suction
Babies can’t blow their own noses, so congestion from a cold pools in their tiny nasal passages and triggers more coughing. Saline drops combined with a bulb syringe are the most effective way to help. Use drops rather than spray, since drops are gentler on a baby’s nose.
Place two to three saline drops in one nostril. Then squeeze the bulb syringe before placing the tip gently into the nostril (not too deep, baby nostrils are small). Release the bulb to create suction and draw out the mucus. Repeat on the other side. The best times to do this are before feedings and before bed, since clear nasal passages make it easier to eat and sleep. Clean the bulb syringe with hot, soapy water after each use and let it air dry completely.
You can buy pre-made saline drops or make your own by dissolving half a teaspoon of non-iodized salt and a quarter teaspoon of baking soda in one cup of warm water. Use sterile, distilled, or previously boiled water. Don’t suction too frequently in a single session, as it can irritate the delicate lining of your baby’s nose.
Add Moisture to the Air
Dry air dries out nasal passages and makes coughing worse. A humidifier in your baby’s room keeps the airway moist and helps mucus flow more easily. Always choose a cool-mist humidifier for a baby’s room. Warm-mist humidifiers and steam vaporizers pose a burn risk if your child gets too close or the unit tips over.
Humidifiers need regular cleaning to prevent bacteria and mold from growing inside. Empty the tank and dry all surfaces daily. Filling it with distilled or purified water reduces mineral buildup. Another quick option: run a warm shower with the bathroom door closed for several minutes, then sit in the steamy bathroom with your baby on your lap. The warm mist can provide temporary relief, especially before bedtime.
Safe Sleep With a Cough
It’s tempting to prop up one end of the crib so your congested baby sleeps at an angle, but this is not safe. Research shows that elevating the crib mattress does not reduce congestion or reflux symptoms, and it creates a risk that your baby slides toward the foot of the crib into a position that compromises breathing. Keep the sleep surface firm, flat, and level, and always place your baby on their back. If congestion is making sleep difficult, try a saline-and-suction session right before putting your baby down.
What the Cough Sound Tells You
Not all coughs are the same, and the sound can help you figure out what’s going on.
A wet, rattly cough usually means your baby’s body is trying to clear mucus from the lower airways. This is the typical sound of RSV (respiratory syncytial virus), which often starts like an ordinary cold with a runny nose, mild congestion, and low fever before the deeper cough develops. RSV can move into the lungs and make breathing harder, especially in very young infants.
A dry, high-pitched barking cough that sounds like a seal is the hallmark of croup, a condition caused by swelling in the upper airway around the voice box and windpipe. Croup tends to get worse at night and may come with a raspy voice. Because the swelling is in the upper airway rather than the lungs, croup responds well to cool night air or a steamy bathroom. It often starts with a runny or stuffy nose before the distinctive bark appears.
A cough that comes in intense, rapid-fire bursts followed by a gasping inhale (the “whoop”) can signal whooping cough, which is more dangerous in young babies who may not have completed their vaccinations yet. This pattern warrants an immediate call to your doctor.
Signs of Breathing Trouble
A cough alone is usually not an emergency, but certain signs mean your baby is working too hard to breathe and needs medical attention right away.
- Nasal flaring: The nostrils spread wide open with each breath, a sign your baby is straining to pull in enough air.
- Retractions: The skin pulls inward just below the neck, under the breastbone, or between the ribs each time your baby inhales. This means the chest muscles are working overtime to expand the lungs.
- Stridor: A high-pitched sound when your baby breathes in (not out). This indicates narrowing or swelling in the upper airway.
- Fast breathing or pauses: Breathing that looks noticeably rapid, or stretches where your baby seems to stop breathing for several seconds.
- Color changes: Bluish tint around the lips, fingernails, or skin.
Also call your doctor if your baby is under 3 months old with any cough, if a fever lasts more than a few days, if the cough persists beyond two weeks, or if your baby refuses to eat or shows signs of dehydration. A cough that keeps getting worse instead of gradually improving is another reason to check in sooner rather than later.