Croup Treatment: How to Help Your Child's Barking Cough

Medically Reviewed By: Dr. Melissa Tribuzio, MD, Board-Certified Pediatrician at Blueberry Pediatrics

Croup is a common childhood respiratory infection that causes a distinctive barking cough, hoarse voice, and noisy breathing called stridor. Croup treatment for most cases is straightforward — cool mist, fluids, and comfort measures at home. Croup typically resolves within 3 to 5 days. Seek immediate medical attention if your child has difficulty breathing, blue or gray lips, or stridor that does not stop at rest.

It is 2 a.m. and your toddler wakes up with a cough that sounds like a barking seal. Their breathing is noisy and they are scared. You are scared too. This is croup, and it is one of the most common reasons parents call their pediatrician in the middle of the night. According to data published in StatPearls (2024), about 3% of children under age 5 get croup each year, mostly between 6 months and 3 years of age. The good news: roughly 85% of cases are mild and can be managed safely at home.

Below, you will find what croup is, how to treat it at home, when to call your pediatrician, and when to go to the emergency room.

Key Takeaways

• Croup is a viral infection of the upper airway that causes a barking cough, hoarse voice, and sometimes stridor (noisy breathing when inhaling).
• Most cases are mild and resolve in 3 to 5 days with home care including cool mist, fluids, and keeping your child calm.
• Symptoms are usually worst at night, particularly on nights 2 and 3 of the illness.
• Treatment with a corticosteroid (like dexamethasone or prednisolone) prescribed by your pediatrician can significantly reduce swelling and shorten symptoms.
• Call 911 or go to the ER if your child has blue or gray lips, is struggling to breathe, or has stridor at rest.
• A pediatrician can assess your child's croup severity via telehealth and prescribe medication if needed — even at 2 a.m.

Worried about your child's croup? Our pediatricians are available evenings and weekends. Start a visit at blueberrypediatrics.com.

What Is Croup?

Croup is a viral infection that causes swelling in the voice box (larynx) and windpipe (trachea), narrowing the airway and producing that characteristic barking cough.

The most common cause is parainfluenza virus, which accounts for more than two-thirds of croup cases. Other viruses including influenza, RSV, adenovirus, and rhinovirus can also cause croup. In recent years, some children have developed croup-like symptoms after infection with SARS-CoV-2, particularly the Omicron variant.

Croup is most common in children between 6 months and 3 years old, though it can occur in children as young as 3 months and as old as 15 years. Boys are affected slightly more often than girls at about a 1.5 to 1 ratio. Most cases happen in the fall and early winter months.

There are three types of croup your pediatrician may identify:

• Viral croup (most common): Starts with cold-like symptoms and develops into a barking cough. Self-limited and usually resolves in 3 to 5 days.
• Spasmodic croup: Comes on suddenly at night without prior cold symptoms or fever. Often recurrent and may be associated with allergies or reflux.
• Recurrent croup: If your child has croup two or more times per year, your pediatrician may recommend an evaluation by an ear, nose, and throat (ENT) specialist to rule out underlying airway conditions.

What Does Croup Sound Like? Symptoms to Watch For

Croup has a sound most parents never forget — a harsh, barking cough that sounds like a seal. Knowing the full range of symptoms helps you respond quickly.

Common croup symptoms include:

• A loud, barking cough that worsens at night
• Hoarse or raspy voice
• Stridor — a high-pitched, squeaky sound when your child breathes in
• Low-grade fever (typically 100.4°F to 102°F; higher fevers may suggest a bacterial complication and warrant medical evaluation)
• Runny nose and congestion in the first day or two
• Fussiness and difficulty sleeping

Symptoms tend to be worse at night because cool, dry nighttime air and lying flat can increase airway swelling. Crying and agitation also make symptoms worse because they cause the airway to narrow further.

Croup Severity: How to Tell If It Is Mild, Moderate, or Severe

Understanding severity helps you decide the right next step — home care, a call to your pediatrician, or a trip to the ER.

Mild croup (about 85% of cases):

• Occasional barking cough
• No stridor when your child is resting calmly
• No visible chest or neck retractions
• Your child is comfortable and can drink fluids normally

Moderate croup:

• Frequent barking cough
• Stridor you can hear when your child is resting (not just when crying)
• Visible pulling in of the chest or neck with each breath (retractions)
• Your child is not in distress but is clearly uncomfortable

Severe croup:

• Loud stridor at rest that may be getting quieter (a sign of worsening, not improvement)
• Significant retractions with every breath
• Your child is agitated, anxious, or unusually drowsy
• Decreased air movement — you may notice less sound from the chest

How to Treat Croup at Home

Most mild croup cases can be managed at home. Your most important job right now is keeping your child calm. Crying and agitation tighten the airway and make symptoms worse.

Keep your child calm. This is the single most important step. Hold your child upright in your lap, speak in a soothing voice, read a story, or turn on a favorite show. Avoid examining your child's throat or doing anything that increases distress.

Try cool mist. Place a cool mist humidifier in your child's bedroom. You can also bundle your child warmly and step outside into the cool night air for 10 to 15 minutes — many parents find this especially helpful during nighttime flare-ups. Some parents find sitting in a steamy bathroom helpful.

Offer plenty of fluids. Small, frequent sips of water, breast milk, formula, or an electrolyte drink help keep your child hydrated and soothe an irritated throat. Warm clear liquids like broth can also be comforting for older toddlers.

Elevate your child's head during sleep. For children over 2 years, an extra pillow can help. For younger toddlers and infants, always follow safe sleep guidelines — place them on their back on a firm, flat surface with no pillows, blankets, or soft bedding. Sitting upright in a parent's arms while awake and supervised during the worst episodes can provide relief.

Use fever reducers if needed. Acetaminophen (Tylenol) or ibuprofen (Motrin, for children over 6 months) can help with fever and discomfort. Follow the dosing instructions on the package or from your pediatrician.

What NOT to give your child:

• No over-the-counter cough or cold medicines for children under 4 years old, and only as directed by your pediatrician for ages 4 to 6 (per FDA and AAP recommendations)
• No mentholated chest rubs on young children's faces — these can worsen airway irritation
• No essential oils near your child's face or in a humidifier — they may irritate the airways and no clinical evidence supports their use for croup
• No antibiotics — croup is caused by a virus, so antibiotics will not help

When Does Croup Need Medical Treatment?

While most croup is mild, some cases need medical attention. Here is how to tell when home care is enough, when to call your doctor, and when to call 911.

Call your pediatrician or start a Blueberry visit if:

• Your child has stridor when active or crying but not at rest
• Symptoms have not improved after 3 to 5 days
• Fever goes above 104°F (40°C)
• Your child is not drinking enough fluids
• You are unsure about the severity

A Blueberry pediatrician can assess your child's croup severity via video and prescribe medication if needed — no ER wait.

Call 911 or go to the ER immediately if your child:

• Has stridor at rest
• Is struggling to breathe with visible chest and neck retractions
• Has blue or gray lips, fingertips, or skin
• Is drooling and unable to swallow
• Seems unusually agitated, confused, or very drowsy
• Cannot speak or cry because of breathing difficulty
• Is under 6 months old with croup symptoms

What your pediatrician may prescribe:

Dexamethasone is the most common prescription treatment for croup. It is a corticosteroid that reduces swelling in the airway. Most children only need one dose.

In the emergency room, doctors may also use nebulized epinephrine for severe cases. This medication works quickly to reduce airway swelling but wears off in about 2 hours, so children are typically monitored before going home.

Croup vs. RSV vs. Whooping Cough: How to Tell the Difference

Is it croup, RSV, or whooping cough? These three conditions sound different and need different responses.

Croup:

• Barking, seal-like cough
• Hoarse voice
• Worse at night
• Most common ages 6 months to 3 years
• Usually resolves in 3 to 5 days
• Most common in fall and winter

RSV (respiratory syncytial virus):

• Wet, mucusy cough
• Wheezing on exhale (not inhale)
• Rapid breathing
• Most dangerous in babies under 12 months
• Can last 1 to 2 weeks
• Most common in winter
• Preventable with vaccination

Whooping cough (pertussis):

• Intense coughing fits that may be followed by a "whoop" sound when inhaling
• Coughing may cause gagging or vomiting
• Can last weeks to months
• Can affect any age but most dangerous in infants
• Preventable with vaccination

If you are unsure which type of cough your child has, a pediatrician can help determine the cause and recommend the right treatment.

How Long Does Croup Last?

Most croup episodes follow a predictable pattern and resolve within 3 to 5 days.

Here is what to expect:

• Days 1 to 2: Cold-like symptoms appear — runny nose, mild fever, and a slightly hoarse voice.
• Nights 2 to 3: The barking cough and stridor peak. These are usually the worst nights.
• Days 4 to 5: Symptoms improve noticeably during the day, though nighttime coughing may linger.
• Week 2: A mild cough may continue for up to 1 to 2 weeks as the airway fully heals, but the barking quality fades.

If your child has croup two or more times per year (recurrent croup), talk to your pediatrician about whether an ENT evaluation is appropriate. Recurrent croup can sometimes signal an underlying airway condition.

Can You Prevent Croup?

There is no vaccine specifically for croup, but several steps can lower your child's risk of catching the viruses that cause it.

• Wash hands frequently with soap and water, especially after being around other children.
• Keep your child away from people who are sick with cold or flu symptoms.
• Stay current on immunizations. The flu, COVID, and RSV vaccines help since these viruses can cause croup.
• Clean frequently touched surfaces like doorknobs, toys, and countertops.
• Breastfeeding may offer some protection for infants by passing along immune antibodies.

How Blueberry Pediatrics Can Help With Croup

Croup often strikes after hours — usually in the middle of the night when your pediatrician's office is closed. That is exactly when Blueberry Pediatrics can help.

With Blueberry, you can start a telehealth visit with a board-certified pediatrician from your home, even at 2 a.m. Most croup calls come in between midnight and 3 a.m., and our pediatricians often find that parents have already done the right things before the visit even starts — the calm voice, the cool air, the upright hold. A video visit lets us confirm what you are doing is working or step in with a prescription if it is not. Your pediatrician can:

• Assess your child's croup severity via video
• Prescribe dexamethasone and send it to your local pharmacy
• Help you decide whether an ER visit is necessary
• Provide reassurance and a clear plan for the next few days

You do not have to bundle a sick, scared child into the car at 2 a.m. or sit in an ER waiting room. A board-certified pediatrician can see your child from home.

Start a visit at blueberrypediatrics.com.

Frequently Asked Questions About Croup

Is croup contagious?

Yes. The viruses that cause croup spread through respiratory droplets (coughing and sneezing) and by touching contaminated surfaces. Your child is most contagious during the first few days of symptoms when they have a fever. Keep them home from daycare until the fever is gone and they are feeling better.

Can adults get croup?

Adults can catch the same viruses that cause croup in children, but they rarely develop the barking cough because adult airways are larger. Instead, adults typically experience cold symptoms or laryngitis.

What is the best sleeping position for a child with croup?

Elevate your child's head slightly during sleep. For children over 2 years, an extra pillow or raising the head of the mattress can help. For younger toddlers and infants, always follow safe sleep guidelines — place them on their back on a firm, flat surface with no pillows, blankets, or soft bedding.

Should I take my child to the ER for croup?

Go to the ER if your child has blue or gray lips, is struggling to breathe with retractions, has stridor at rest, or seems confused or unusually drowsy. For mild to moderate cases, a telehealth visit with a Blueberry pediatrician can help you assess severity and get treatment without an ER trip.

Is croup worse at night?

Yes. Croup symptoms typically worsen at night due to cool, dry air and the effects of lying flat. Nighttime is when the barking cough and stridor are most noticeable. The worst nights are usually nights 2 and 3 of the illness.

Sources

1. Aregbesola A, et al. Glucocorticoids for croup in children. Cochrane Database of Systematic Reviews. 2023.
2. StatPearls. Croup. National Library of Medicine. Updated 2024.
3. American Academy of Pediatrics. Croup and Your Young Child. HealthyChildren.org. Accessed 2024.
4. Moore M, Little P. Humidified air inhalation for treating croup. Cochrane Database of Systematic Reviews. 2006.
5. U.S. Food and Drug Administration. Use Caution When Giving Cough and Cold Products to Kids. FDA Consumer Updates.
6. HealthyChildren.org (AAP). Croup in Young Children. American Academy of Pediatrics.

This article is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your child's pediatrician or another qualified health provider with any questions about a medical condition.

Still worried about your child's croup? Start a visit with a board-certified pediatrician now at blueberrypediatrics.com.