Congenital Laryngeal Stridor in Children
What is congenital laryngeal stridor?
Congenital laryngeal stridor is a noisy or high-pitched sound with breathing. It is
from an abnormally formed voice box (larynx). It is present at birth (congenital).
What causes congenital laryngeal stridor?
Congenital laryngeal stridor is the most common cause of noisy breathing (stridor)
in babies. During the baby’s development, the larynx may not fully develop. As a result,
part of the larynx is weak. This causes the larynx to close part of the way during
What are the symptoms of congenital laryngeal stridor?
The main symptom is the stridor that is heard as the baby breathes. It is best heard
when a baby breathes in. It can also be heard when the baby breaths out.
- Changes with activity
- Is present during eating, sleeping, or excitement
- Is usually less noisy when the baby is lying on his or her belly
- Gets worse if the baby has an upper respiratory infection, like a cough or cold
The symptoms of congenital laryngeal stridor can be like other health conditions.
Make sure your child sees his or her healthcare provider for a diagnosis.
How is congenital laryngeal stridor diagnosed?
The healthcare provider will ask about your baby’s symptoms and health history. He
or she will give your baby a physical exam. The provider may refer you to an ear,
nose, and throat (ENT) specialist. Your baby may need diagnostic tests such as laryngoscopy.
This is a test to look at the larynx.
How is congenital laryngeal stridor treated?
In most cases, congenital laryngeal stridor is a harmless condition that goes away
on its own. Although not common, some babies develop severe breathing problems which
need treatment. Treatment may include medicines, a hospital stay, or surgery.
Treatment will depend on your baby’s symptoms, age, and general health. It will also
depend on how severe the condition is.
What are the complications of congenital laryngeal stridor?
In severe cases, congenital laryngeal stridor may be a sign of a blocked airway.
Living with congenital laryngeal stridor
Your baby’s healthcare provider will recheck your baby. He or she will make sure your
baby is eating well and gaining weight.
When should I call my child's healthcare provider?
Call your baby’s healthcare provider if your baby is not eating well or growing well.
Call 911 or your local emergency number if your baby has trouble breathing.
Key points about congenital laryngeal stridor
- Congenital laryngeal stridor is an abnormally formed voice box (larynx). It is present
at birth (congenital).
- During the baby’s development, the larynx may not fully develop.
- The stridor is usually heard when the baby breathes in, but it can also be heard when
the baby breathes out.
- Procedures to diagnose congenital laryngeal stridor may include laryngoscopy or bronchoscopy.
- In most cases, congenital laryngeal stridor is a harmless condition that goes away
on its own.
Tips to help you get the most from a visit to your child’s health care provider:
- Before your visit, write down questions you want answered.
- At the visit, write down the names of new medicines, treatments, or tests, and any
new instructions your provider gives you for your child.
- If your child has a follow-up appointment, write down the date, time, and purpose
for that visit.
- Know how you can contact your child’s provider after office hours. This is important
if your child becomes ill and you have questions or need advice.