Most baby coughs are caused by common viruses and will clear up on their own within a week or two. Your main job is to keep your baby comfortable, keep fluids going in, and watch for a handful of specific warning signs that mean it’s time to call the pediatrician or head to the ER. There’s no safe cough medicine for babies, so home care is the frontline treatment.
What the Cough Sounds Like Matters
Not all coughs signal the same thing, and paying attention to the sound can help you figure out what’s going on. A wet, mucus-y cough usually means your baby has a standard cold with congestion draining into the throat. A dry cough without much mucus often comes from irritation in the upper airway, sometimes triggered by dry air or the tail end of a virus.
A harsh, barking cough that sounds like a seal is the hallmark of croup. Croup is caused by swelling around the voice box and windpipe, usually from a parainfluenza virus. When your baby coughs, air gets forced through that narrowed passage and the swollen vocal cords produce that distinctive bark. Croup tends to sound worse at night and can come with a high-pitched sound when your baby breathes in.
A cough that starts mild and then progresses to wheezing or difficulty breathing over a few days could point to RSV (respiratory syncytial virus), which is especially concerning in babies under 6 months. RSV often begins looking like a regular cold with a runny nose and reduced appetite, then worsens around day 3 to 5. Many infants with RSV won’t even have a fever, so don’t rely on temperature alone to gauge severity.
Why You Should Skip Cough Medicine
The FDA does not recommend over-the-counter cough and cold medicines for children younger than 2 because they can cause serious, potentially life-threatening side effects. Manufacturers have voluntarily gone further, labeling these products with warnings not to use them in children under 4. The FDA also warns against homeopathic cough and cold products for children under 4, noting there are no proven benefits.
Honey is a common cough remedy for older kids, but never give honey to a baby under 1 year old. Honey can contain bacterial spores that produce toxins in an infant’s immature gut, leading to infant botulism, a rare but serious form of paralysis. This applies to all types of honey, pasteurized or not, and includes honey mixed into food, water, or placed on a pacifier. After age 1, children have enough protective gut bacteria to handle these spores safely.
Clearing Mucus With Saline and Suction
Babies breathe primarily through their noses, so a stuffed-up nose often makes the cough worse and makes feeding harder. Saline nose drops followed by gentle suctioning with a bulb syringe is the single most effective thing you can do at home. Put a couple of saline drops in each nostril, then hold your baby with their head tilted back for about a minute to let the saline thin the mucus. Then use the bulb syringe to gently suction it out.
A few practical rules: always suction before feedings, not after, because suctioning on a full stomach can cause vomiting. Limit suctioning to no more than 4 times a day so you don’t irritate the delicate lining of your baby’s nose. If the mucus is too thick to suction even with saline, your pediatrician can prescribe stronger drops.
Keeping Your Baby Hydrated
Sick babies lose fluid faster and often eat less, so staying on top of hydration is critical. For babies under 1, stick with breast milk, properly mixed formula, or an oral rehydration solution (ORS). Do not give plain water, tea, broth, or fruit juice to babies under 1. And never dilute formula or mix ORS into it.
If your baby is refusing normal feedings, try offering smaller amounts more frequently. A good target for babies under 1 is 1 to 2 teaspoons of breast milk, formula, or ORS every 5 to 10 minutes using a spoon or syringe. For children over 1, you can also offer water, milk, popsicles, gelatin, or clear juices like apple juice in small sips of about 1 to 2 tablespoons every 20 minutes.
Using a Humidifier Safely
Adding moisture to the air helps loosen mucus and soothe irritated airways. The American Academy of Pediatrics recommends a cool-mist humidifier rather than a warm-steam vaporizer, because vaporizers can cause burns if a baby gets too close or knocks the device over. Place the humidifier near (but not directly next to) the crib, and clean it regularly to prevent mold buildup.
For croup specifically, cool night air can also help. Some parents find that bundling their baby up and stepping outside for a few minutes during a croupy episode noticeably calms the cough.
Safe Sleep With a Cough
It’s tempting to prop your baby’s head up so they can breathe easier, but this is not safe. The AAP recommends that babies always sleep flat on their backs on a firm, even surface with nothing else in the crib: no pillows, wedges, towels, or rolled blankets. Propping a baby’s head or inclining the mattress can cause the neck to bend forward or to the side, which actually kinks the airway and makes breathing harder, not easier. The Consumer Product Safety Commission has banned inclined sleepers for exactly this reason.
If your baby is congested at bedtime, do a saline-and-suction session right before laying them down. Running the cool-mist humidifier in the room will also help them breathe more comfortably through the night.
Managing Fever and Discomfort
If your baby has a fever along with the cough, infant acetaminophen (like Tylenol) can be given every 4 to 6 hours, up to 5 doses in 24 hours. Do not give acetaminophen to babies younger than 3 months without a doctor’s guidance. Ibuprofen (like Motrin) is an option every 6 to 8 hours, up to 4 doses a day, but only for babies 6 months and older. Both medications are dosed by weight, not age, so check the packaging carefully or call your pediatrician’s office for the right amount.
Signs That Need Medical Attention
Most coughs in babies are viral and will run their course, but certain signs mean you should call your pediatrician or go to the emergency room promptly:
- Difficulty breathing: Look for the skin pulling inward between the ribs with each breath, nostrils flaring wide, or a high-pitched whistling sound when breathing in.
- Pauses in breathing: In very young infants, especially those under 6 months, RSV and other infections can cause breathing pauses lasting 10 seconds or more.
- Refusing to drink: A baby who won’t take breast milk, formula, or fluids for several feedings in a row is at risk of dehydration.
- Worsening after improvement: A cough that seemed to be getting better and then suddenly gets worse may signal a secondary infection.
- Fewer wet diapers: Noticeably fewer wet diapers than usual is an early sign of dehydration.
- Extreme fussiness or unusual sleepiness: A baby who is much harder to console than normal, or unusually limp and unresponsive, needs to be seen right away.
- Fever in a newborn: Any fever in a baby under 3 months old warrants an immediate call to your pediatrician.
A cough that lingers beyond 2 to 3 weeks, even without other worrying symptoms, is also worth mentioning to your baby’s doctor to rule out less common causes like allergies or whooping cough.