A coughing baby is unsettling, especially in the middle of the night. The good news is that most baby coughs come from common viral illnesses and resolve on their own within one to three weeks. A small number are warning signs of something more serious that needs urgent care. This handout is meant to help you tell the difference and to know exactly when to call us.
What Causes a Baby Cough
Viral upper respiratory infections (the common cold).
Mucus drips down the back of the throat and triggers coughing, especially at night when a baby is lying flat. A wet or rattly cough from a cold typically resolves within one to three weeks.
Bronchiolitis and RSV.
Respiratory syncytial virus (RSV) and similar viruses can cause bronchiolitis, which affects the smallest airways in the chest. Expect a cough together with rapid breathing, wheezing, or a look of working harder than normal. Florida has historically seen earlier onset and a longer RSV season than much of the country, and recent ACIP and AAP timing guidance for RSV prevention has reflected that regional pattern. Contact ELP for current local timing recommendations.
Two tools prevent severe RSV in infants. Nirsevimab (Beyfortus) is a monoclonal antibody given as a single dose to infants during their first RSV season. Abrysvo is a vaccine given to pregnant women between 32 and 36 weeks to protect the baby after birth. In most cases, babies receive one or the other, not both. Ask us which option is right for your family.
Croup.
A sudden barking, seal-like cough, often starting overnight, is the hallmark of croup. Stridor, a harsh high-pitched sound on inhaling, signals more significant airway swelling. Many cases can be managed at home with cool, humid air, but stridor at rest or trouble breathing needs urgent evaluation.
Pertussis (whooping cough).
Pertussis often starts like a cold and then develops into coughing fits, sometimes with a characteristic whoop on the inhale or vomiting at the end of a fit. Infants under six months can have pauses in breathing (apnea) instead of a classic whoop. Pertussis is dangerous in young infants, so call us early if you are worried. Prevention matters here. Tdap is recommended for pregnant women between 27 and 36 weeks of every pregnancy, which provides antibody protection until your baby can begin the DTaP series at two months. Keeping household contacts up to date on Tdap is also important.
Irritants and allergens.
Irritants such as tobacco smoke, vape aerosols, strong fragrances, and wood smoke can trigger a dry, tickly cough at any age. Keep the home smoke-free and free of aerosolized irritants. Allergic triggers like dust mites and pet dander become more relevant in toddlers and older children, but are uncommon causes of cough in babies under one year.
Foreign body aspiration.
A sudden, severe coughing or choking episode in a previously well baby, especially after feeding or playing with small objects, can mean something is stuck in the airway. This becomes a more common concern once babies are mobile and reaching for objects, typically after six months. Persistent cough or wheeze on only one side of the chest after a choking episode needs prompt evaluation.
Red Flags: Call Us or Go to the ER
- Any fever at or above 100.4°F (38°C) in a baby under three months. This is always a same-day call.
- Fast breathing at rest: more than 60 breaths per minute under two months, more than 50 from two to twelve months, or more than 40 from one to five years.
- Nostrils flaring with each breath.
- Skin pulling in between the ribs or at the base of the neck during breathing (retractions).
- Stridor, the harsh sound with each inhale, at rest.
- Pauses in breathing (apnea).
- Bluish color of the tongue, gums, or face, which signals low oxygen and is a 911 situation.
- A cough that comes in fits (paroxysms) or causes vomiting with nearly every episode.
- Refusal to feed, fewer wet diapers, or unusual sleepiness.
- A cough that started with a choking episode on food or a small object.
When in doubt, call. We would rather hear from you early.
When to Call During Office Hours
- A cough lasting longer than three weeks.
- Fever that lasts more than three days with a cough.
- A child with known asthma whose cough is not improving with their usual rescue medication.
- Cough paired with ear pain, which may suggest an ear infection.
What to Expect at the Visit
We will ask when the cough started, what it sounds like (dry, wet, barking, or fit-like), whether there is fever, and how feeding, sleep, and activity have been affected. We will listen to the chest, check oxygen levels, measure breathing rate, and examine the ears, nose, and throat. Depending on what we find, we may order a viral swab or a chest x-ray, though most infant coughs do not require either.
What You Can Do at Home
- Sterile, store-bought saline nasal drops followed by a suction bulb or NoseFrida clear the nose and help a baby feed and sleep better. Use them before feeds and at bedtime. Do not use homemade saline solutions in babies under one year.
- Offer smaller, more frequent feeds so your baby stays hydrated.
- A cool-mist humidifier in the sleep area may help some babies feel more comfortable. Clean it daily to prevent mold growth. The evidence for humidifiers is limited, so do not feel obligated to buy one.
- Keep the home smoke-free, including secondhand and thirdhand smoke on clothing and furniture.
What Not to Do
- No over-the-counter cough or cold medicines in young children. FDA labeling says do not use under four years, and the four to six year range should only be used as directed by a physician. AAP and Schmitt recommend avoiding these products under age six. They are not effective in this age group and can cause harm.
- No honey for infants under twelve months because of the risk of infant botulism. This includes pasteurized honey, which does not reliably eliminate botulism spores. After twelve months, a small amount of honey is acceptable and can actually help with cough.
- Do not prop a sleeping infant on an incline at home. The American Academy of Pediatrics recommends a firm, flat sleep surface. Upright positioning is appropriate during feeding when an adult is holding the baby, not for unsupervised sleep.
Bottom Line
Most baby coughs are viral and pass on their own. Your job is to keep your baby comfortable, watch for warning signs, and reach out when something feels off. Trust your eye for how your baby looks and acts. If something seems different than it should, we want to know about it.
Call ELP at (727) 372-6760 or schedule online. Stay healthy my friends.
Sources
- American Academy of Pediatrics, HealthyChildren.org: articles on cough, bronchiolitis, croup, and pertussis.
- AAP Red Book, current edition: pertussis and RSV.
- Seattle Children’s / Schmitt Pediatric Guidelines: Cough, Wheezing, Stridor, and Fever.
- ACIP and AAP recommendations for nirsevimab (Beyfortus) and the maternal RSV vaccine (Abrysvo).
- AAP Policy Statement, “Sleep-Related Infant Deaths: Updated 2022 Recommendations,” for the flat-surface sleep guidance.
