Understanding Laryngomalacia: The Most Common Cause of Noisy Breathing in Infants

Hearing your baby make unusual breathing sounds can be concerning for any parent. While many newborns make a variety of noises as they adapt to life outside the womb, persistent high-pitched breathing sounds may indicate an underlying condition known as laryngomalacia.

Laryngomalacia is the most common cause of stridor, or noisy breathing, in infants. Although the condition often improves on its own as a child grows, some infants experience more severe symptoms that can affect feeding, breathing, and overall development.

Understanding the signs, symptoms, and treatment options for laryngomalacia can help families feel more confident when seeking care for their child.

What Is Laryngomalacia?

Laryngomalacia is a congenital condition that affects the larynx, commonly known as the voice box.

The term “laryngomalacia” literally means “soft larynx.” In infants with this condition, the tissues above the vocal cords are softer and more flexible than normal. During breathing, these tissues can collapse inward, partially blocking the airway and creating a characteristic high-pitched sound.

This noise, known as stridor, is most noticeable when a baby breathes in and often becomes louder during feeding, crying, excitement, or when lying on their back.

Laryngomalacia is the most common airway abnormality seen in newborns and infants and is responsible for the majority of cases of infant stridor.

What Causes Laryngomalacia?

The exact cause of laryngomalacia is not fully understood. However, specialists believe it may result from a combination of structural and neurological factors.

In many infants, the tissues of the upper larynx lack the firmness or support needed to remain open during breathing. As air moves through the airway, these soft tissues are pulled inward, creating partial obstruction and producing the characteristic breathing sound.

Researchers also believe that some infants may have immature nerve control of the muscles surrounding the larynx, which can contribute to airway collapse during inspiration.

Importantly, laryngomalacia is not caused by anything a parent did or did not do during pregnancy. It is a developmental condition present at birth. [/vc_column_text][/vc_column][/vc_row]

 

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What Is Stridor?

One of the hallmark symptoms of laryngomalacia is stridor.

Stridor is a high-pitched, squeaking, or noisy breathing sound that occurs when airflow passes through a narrowed airway. In laryngomalacia, stridor typically occurs during inhalation, also known as the inspiratory phase of breathing.

Parents often notice the sound:

  • Shortly after birth
  • During feeding
  • When the infant is crying
  • During excitement or activity
  • When lying flat on the back
  • During upper respiratory illnesses

While stridor can sound alarming, it does not always indicate a severe problem. In many cases, it is simply a sign of mild laryngomalacia that improves naturally over time.

How Common Is Laryngomalacia?

Laryngomalacia is one of the most common congenital airway disorders diagnosed in infancy.

The majority of cases are considered mild and resolve without surgical intervention. Most children gradually outgrow the condition as their airway structures mature and strengthen.

For many infants, symptoms improve significantly between 12 and 24 months of age.

However, not all cases follow the same course. Approximately 10% to 30% of children experience symptoms severe enough to require medical treatment or surgery.

Understanding the Different Levels of Severity

Healthcare providers generally classify laryngomalacia as mild, moderate, or severe based on the child’s symptoms and how significantly the condition affects breathing and feeding.

Mild Laryngomalacia

Mild laryngomalacia is the most common form of the condition.

Children with mild disease typically experience:

  • Intermittent noisy breathing
  • Mild stridor
  • Occasional feeding difficulties
  • Normal growth and weight gain

Although the breathing sounds may be noticeable, these infants generally remain healthy and continue to develop normally.

Most children with mild laryngomalacia simply require observation and routine follow-up visits.

Moderate Laryngomalacia

Moderate laryngomalacia involves more significant symptoms that can affect daily feeding and breathing.

Common signs include:

  • Persistent stridor
  • Increased effort when breathing
  • Frequent feeding difficulties
  • Prolonged feeding times
  • Occasional choking or coughing during feeds
  • Symptoms of acid reflux

These infants may require medical management and closer monitoring to ensure healthy growth and development.

Severe Laryngomalacia

Severe laryngomalacia occurs in approximately 20% of infants who present with stridor.

This form of the condition can cause substantial airway obstruction and feeding challenges.

Symptoms may include:

  • Significant breathing difficulties
  • Recurrent cyanosis (episodes where the baby turns blue)
  • Apneic episodes (pauses in breathing)
  • Poor feeding
  • Difficulty gaining weight
  • Failure to thrive
  • Chest retractions during breathing
  • Frequent respiratory distress

Because severe laryngomalacia can affect oxygen levels and growth, prompt evaluation and treatment are essential.

The Connection Between Laryngomalacia and GERD

One of the most important aspects of laryngomalacia management is recognizing its close relationship with gastroesophageal reflux disease (GERD).

Studies estimate that between 65% and 100% of infants with laryngomalacia also experience GERD.

GERD occurs when stomach contents and acid flow backward into the esophagus and throat. In infants with laryngomalacia, this reflux can further irritate the delicate tissues of the larynx.

When stomach acid reaches the voice box, it may cause:

  • Swelling of the airway tissues
  • Increased airway sensitivity
  • Worsening stridor
  • Feeding difficulties
  • Additional breathing symptoms

This creates a cycle in which reflux worsens airway symptoms, and airway abnormalities may contribute to feeding problems that increase reflux.

Why Feeding Difficulties Occur

The airway and digestive tract work closely together during feeding. Because laryngomalacia affects the structures responsible for protecting the airway, some infants struggle with feeding coordination.

Parents may notice:

  • Slow feeding sessions
  • Choking during feeds
  • Coughing while eating
  • Difficulty breastfeeding or bottle-feeding
  • Frequent spit-up
  • Fatigue during feeding
  • Poor weight gain

When feeding difficulties become significant, intervention may be necessary to support adequate nutrition and healthy growth.

How Is Laryngomalacia Diagnosed?

A diagnosis of laryngomalacia often begins with a detailed review of a child’s symptoms and medical history.

During the physical examination, specialists listen carefully to the pattern of breathing and evaluate feeding concerns.

In many cases, diagnosis can be made during an office visit using specialized equipment.

One of the most common diagnostic tools is flexible fiberoptic laryngoscopy. This procedure uses a small camera inserted through the nose to provide a detailed view of the larynx and upper airway while the child is awake.

This examination allows specialists to observe how the airway behaves during breathing and confirm the presence of laryngomalacia.

Additional testing may be recommended when feeding concerns or swallowing difficulties are present.

Evaluating Swallowing and Feeding Function

Because feeding difficulties are common in children with laryngomalacia, further evaluation may be necessary.

One useful diagnostic tool is a Fiberoptic Endoscopic Evaluation of Swallowing (FEES).

This examination allows healthcare providers to observe swallowing function in real time and determine whether food or liquids are entering the airway.

A comprehensive evaluation can provide valuable information about:

  • Airway anatomy
  • Breathing function
  • Swallowing coordination
  • Feeding safety
  • Aspiration risk

This information helps physicians develop the most appropriate treatment plan for each child.

Treatment Options for Laryngomalacia

Treatment depends on the severity of symptoms and the impact on breathing, feeding, and growth.

Observation and Monitoring

Most infants with mild laryngomalacia require no surgical intervention.

Instead, physicians may recommend:

  • Regular follow-up appointments
  • Monitoring growth and weight gain
  • Tracking feeding progress
  • Watching for worsening symptoms

As the airway matures, symptoms often improve naturally.

Managing GERD

Because reflux can worsen airway symptoms, many specialists recommend treating GERD when feeding difficulties are present.

Treatment may include:

  • Acid suppression medications
  • Feeding modifications
  • Positioning strategies
  • Smaller, more frequent feedings

Addressing reflux can significantly improve both feeding and breathing symptoms.

Surgical Intervention

For infants with severe laryngomalacia, surgery may be necessary.

The most common procedure is called a supraglottoplasty. During this surgery, excess tissue causing airway obstruction is carefully trimmed or reshaped to improve airflow.

Surgical treatment is generally reserved for infants experiencing:

  • Significant breathing difficulties
  • Recurrent cyanosis
  • Apneic episodes
  • Failure to thrive
  • Severe feeding problems

The procedure is highly effective and can dramatically improve breathing and feeding outcomes.

When Should Parents Seek Medical Evaluation?

Parents should seek evaluation if their infant experiences:

  • Persistent noisy breathing
  • Difficulty feeding
  • Frequent choking or coughing during feeds
  • Poor weight gain
  • Breathing pauses
  • Blue coloring around the lips or face
  • Increased work of breathing

Early assessment allows specialists to determine whether symptoms are part of a mild condition or require further intervention.

Final Thoughts

Laryngomalacia is the most common cause of stridor in infants and is typically a manageable condition. While many children outgrow the disorder as their airway structures mature, some require medical treatment or surgical intervention to address breathing and feeding challenges.

Because laryngomalacia can affect both the airway and digestive system, comprehensive evaluation is important. Early diagnosis, proper monitoring, and appropriate treatment can help ensure infants breathe comfortably, feed safely, and continue to grow and develop as expected.

At MPENTA, our pediatric ENT specialists provide comprehensive evaluations and treatment for infants and children with laryngomalacia. Our team works closely with families to identify the severity of the condition and the best treatment options for each child’s needs.