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Clinical emergency room medical reference guide at Memorial Springs ER in Spring TX
Oct 15, 20263 min read

What Is Croup?

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A young child coughing into his fist while standing in a pharmacy aisle.

When your child suddenly develops a harsh, barking cough or seems to struggle with breathing, it can be frightening and leave you unsure about what to do next. Croup is a childhood respiratory illness that causes swelling and narrowing in the upper airway, particularly around the voice box and windpipe. It is most common in young children because their airways are smaller, making even mild swelling more significant.

If you are searching for urgent care near me because you are concerned about your child's breathing, prompt medical attention can help determine whether the illness needs immediate treatment. While many cases of croup are mild, airway narrowing can sometimes become serious, especially when breathing becomes difficult. If your child appears unable to breathe normally, seek emergency medical care right away.

What Causes Croup In Children?

It can be frightening when your child suddenly develops a harsh cough or changes in breathing, especially when you are unsure what is happening. Croup usually develops when inflammation and swelling narrow the upper airway, making it harder for air to move normally. In most children, this inflammation is triggered by a respiratory infection, although different viruses and, rarely, bacteria can be responsible.

Human Parainfluenza Virus

Human parainfluenza viruses, particularly HPIV-1 and HPIV-2, are the most common causes of croup in children. These viruses infect the respiratory tract and can cause inflammation around the larynx and windpipe. HPIV-1 is especially associated with croup and commonly circulates during the fall.

Influenza A And B Viruses

Influenza A and B can occasionally cause croup by triggering inflammation and swelling in the upper airway. Children with influenza-related croup may have a more significant respiratory illness because influenza can affect multiple parts of the respiratory tract. Prompt medical evaluation is important if breathing becomes difficult or symptoms become severe.

Respiratory Syncytial Virus (RSV)

Respiratory syncytial virus, commonly called RSV, is another respiratory infection that can cause croup in young children. RSV more commonly causes cold-like illness, bronchiolitis, or pneumonia, but upper-airway inflammation can sometimes produce croup. Infants and very young children are particularly vulnerable to severe RSV-related respiratory illness.

Adenovirus

Adenoviruses are common respiratory viruses that can occasionally cause croup in children. They can produce illnesses ranging from cold-like infections to bronchitis, pneumonia, and croup. Because adenoviruses circulate throughout the year, croup associated with these infections is not limited to one particular season.

Rhinovirus

Rhinoviruses, which are among the most common causes of the common cold, can also be associated with croup. In some children, the respiratory infection can lead to inflammation and swelling around the upper airway. Rhinovirus infections occur throughout the year, with activity often increasing during certain seasonal periods.

Enteroviruses

Enteroviruses have also been identified as less common causes of croup. These viruses can cause a range of illnesses, and some infections can involve the upper respiratory tract. When an enterovirus affects the tissues around the larynx and windpipe, the resulting inflammation can contribute to the airway narrowing associated with croup.

Human Metapneumovirus

Human metapneumovirus is another respiratory virus that has been associated with croup, although it is less common than parainfluenza. It can cause respiratory infections in children and may affect different portions of the respiratory tract. In some cases, inflammation in the upper airway can produce the characteristic croup illness.

Coronavirus Infections

Certain human coronaviruses have been associated with croup, and SARS-CoV-2 can also cause croup in children. COVID-19-related croup has been documented in children, including during periods when newer SARS-CoV-2 variants were circulating. Breathing difficulty should be assessed promptly rather than assumed to be a routine viral illness.

Rare Bacterial Infections

Bacterial causes of croup are uncommon but can occur. Mycoplasma pneumoniae has been associated with croup-like illness, while serious bacterial infections such as diphtheria can cause severe upper-airway inflammation and obstruction. Rapidly worsening breathing difficulty, severe illness, or trouble swallowing requires urgent medical evaluation.

Dangerous Croup Symptoms

Most cases of croup are mild, but airway swelling can sometimes make breathing difficult. Watch closely for symptoms that worsen quickly or occur while your child is resting. Severe breathing problems, changes in skin color, or reduced alertness require urgent medical attention. A study found severe respiratory distress in 4.9% of children evaluated for croup in a pediatric emergency department.

  • Stridor, especially while the child is resting.
  • Rapid, labored, or difficult breathing.
  • Skin pulling in around the ribs, neck, or breastbone when breathing.
  • Blue, gray, or dusky lips or skin.
  • Drooling or difficulty swallowing.
  • Pauses in breathing.
  • Unusual sleepiness, confusion, or reduced responsiveness.
  • Severe weakness or exhaustion.
  • Breathing difficulty that continues or worsens despite calming the child.
  • Rapidly worsening symptoms.

Can Adults Get Croup?

Yes, adults can get croup, but it is rare. Croup mainly affects young children because their smaller airways are more easily narrowed by inflammation and swelling. As the airway grows larger with age, the same amount of swelling is less likely to cause the characteristic breathing problems seen in children. When croup does occur in an adult, symptoms can sometimes be more severe and may require medical evaluation and treatment.

When To Go To The ER

Most children with croup recover with home care, but severe airway swelling can become an emergency. Take your child to the ER when breathing becomes significantly difficult, symptoms rapidly worsen, or your child shows signs of low oxygen or reduced alertness. Immediate medical care is especially important when breathing problems continue even when your child is calm.

  • Struggles to breathe or appears unable to get enough air.
  • High-pitched breathing sounds while resting or breathing in and out.
  • Blue or gray lips, face, or fingernails.
  • Trouble swallowing or excessive drooling with breathing difficulty.
  • Pauses in breathing or severe breathing distress.
  • Extreme tiredness, unusual sleepiness, or difficulty staying awake.
  • Rapidly worsening breathing that does not improve after calming your child.

When your child is struggling to breathe, we understand how stressful it can feel to seek emergency care; knowing that the ER wait time is under 12 minutes can provide some reassurance when urgent evaluation is needed.

How To Treat Croup

It can be stressful when your child has a barking cough or breathing changes, but most cases of croup improve with appropriate care. Treatment depends on how severe the airway swelling is and whether breathing is affected. Mild cases can often be managed at home, while moderate or severe cases may need prescription medicine or emergency treatment.

  • Keep Your Child Calm: Comfort your child and keep them relaxed because crying can worsen breathing difficulty.
  • Offer Fluids: Give frequent fluids to help prevent dehydration, particularly if your child has a fever.
  • Acetaminophen: Most doctors recommend acetaminophen for fever or discomfort when used at the appropriate child-specific dose.
  • Ibuprofen: Most doctors recommend ibuprofen for children older than 6 months to help reduce fever or discomfort when appropriately dosed.
  • Honey: For children older than 1 year, honey may help soothe coughing. Never give honey to infants under 1 year.
  • Corticosteroids: Most doctors recommend corticosteroids such as dexamethasone to reduce airway swelling and improve breathing.
  • Nebulized Epinephrine: Most doctors recommend nebulized epinephrine for moderate to severe croup because it can rapidly reduce airway swelling.
  • Oxygen Therapy: Children with low oxygen levels may receive supplemental oxygen under medical supervision.
  • Emergency Airway Support: Severe airway obstruction may require advanced airway management, including intubation in rare cases.
  • Avoid Cough Medicines: Most doctors do not recommend over-the-counter cough medicines for young children with croup because they do not treat airway swelling.

When Should You Seek Emergency Care For Croup?

If your child has croup with severe breathing difficulty, persistent stridor, blue or gray lips, trouble swallowing, extreme tiredness, or rapidly worsening symptoms, Memorial Springs ER in Spring, Texas, is available 24/7 for emergency evaluation and care. Our experienced emergency team can quickly assess concerns about breathing problems and provide appropriate treatment.

When your child is struggling to breathe, waiting for symptoms to improve can be frightening and unsafe. Prompt emergency care can help prevent serious complications when airway swelling becomes severe. Memorial Springs ER is open 24/7, with patients seen in under 12 minutes, helping your child receive timely medical attention when every minute matters.

Key Takeaways

  • Croup is a respiratory illness that causes swelling and narrowing of the upper airway in children.
  • Viruses, especially human parainfluenza viruses, are the most common causes of croup.
  • Most cases are mild, but severe airway swelling can cause dangerous breathing problems.
  • Corticosteroids are commonly used to reduce airway swelling, while nebulized epinephrine may be needed for moderate to severe croup.
  • Seek emergency care if your child has severe breathing difficulty, blue or gray skin, persistent stridor, or reduced alertness.

Frequently Asked Questions

What Does Croup Sound Like?

Croup typically causes a harsh, barking cough that may sound similar to a seal's bark. Some children also develop a high-pitched, raspy sound called stridor when breathing in. Stridor that occurs while your child is resting can indicate more significant airway narrowing and needs prompt medical attention.

Why Is Croup Worse At Night?

Croup often seems worse at night because coughing and breathing difficulties can become more noticeable when a child is lying down and sleeping. Natural changes in airway inflammation and hormone levels overnight may also contribute. Keeping your child calm can help prevent crying from making breathing symptoms worse.

Is Croup Contagious?

Yes, croup can be contagious when it is caused by a respiratory virus. The viruses responsible for croup can spread through respiratory droplets and contaminated surfaces, particularly when an infected child coughs or sneezes. Good hand hygiene and avoiding close contact while sick can help reduce transmission.

How Long Does Croup Last?

Most cases of croup improve within three to five days, although the cough can sometimes last longer. Symptoms are often most noticeable during the first few days and may fluctuate, particularly at night. Seek medical care if breathing difficulty persists, worsens, or returns after improving.

How Long Is Croup Contagious?

There is no single contagious period for croup because it depends on the virus causing the infection. A child is generally most contagious during the early part of the illness when respiratory symptoms are most active. Follow your healthcare provider's advice about when your child can safely return to school or daycare.