6 Warning Signs of Laryngomalacia in Babies and Infants

For many parents, hearing an unusual sound during their baby’s breathing can be a worrying experience. A soft squeak, noisy breath, or high-pitched sound, especially when a newborn is feeding, crying, or lying down, may sometimes be linked to laryngomalacia, one of the most common causes of noisy breathing in infants. While the name may sound unfamiliar, understanding the signs can help parents recognize when their baby may need medical attention.

Laryngomalacia occurs when the tissues above the voice box (larynx) are softer than usual, causing them to temporarily collapse inward during breathing. This can partially block airflow and create a characteristic sound called stridor. In many babies, the condition is mild and improves naturally as the airway structures become stronger with growth. However, some infants may experience feeding difficulties, breathing challenges, or slower weight gain that require closer monitoring.

Laryngomalacia is estimated to affect approximately 1 in every 2,000 to 3,000 newborns, although some mild cases may go unnoticed because symptoms can be subtle. It accounts for a large proportion of congenital airway conditions diagnosed in infants. Symptoms often begin within the first few weeks after birth and may become more noticeable during feeding, crying, excitement, or when the baby is lying on their back.

The signs of laryngomalacia can vary from one baby to another. Some infants may only have occasional noisy breathing, while others may show signs that suggest the airway or feeding process is being affected. Paying attention to changes in breathing patterns, feeding habits, and overall growth can help parents know when to discuss concerns with a healthcare provider.

Although many babies with laryngomalacia improve without major treatment, recognizing warning signs is important for identifying infants who may need additional support. Early evaluation can help ensure proper monitoring and reduce the risk of complications.

In this article, we will explore the 6 warning signs of laryngomalacia, including the symptoms parents should watch for, why they happen, and when it may be important to seek medical advice. Continue reading to learn more about this infant airway condition and the signs that can help you better understand your baby’s breathing.

What is Laryngomalacia and What Causes This Condition in Infants?

Laryngomalacia is the most common congenital abnormality of the larynx, caused by immature and soft tissues collapsing over the airway during inhalation, leading to noisy breathing in infants. This condition stems from underdeveloped cartilage and poor neuromuscular control of the structures above the vocal cords.

What is the Medical Definition of Laryngomalacia?

Medically, laryngomalacia is defined as the most common cause of congenital stridor, characterized by the dynamic, inward collapse of supraglottic laryngeal tissues, specifically the epiglottis, arytenoid cartilages, and aryepiglottic folds, during inspiration.

This collapse creates a partial and temporary obstruction of the airway, which forces air through a narrowed passage, causing the turbulent airflow that produces the high-pitched sound known as stridor. The term itself breaks down into “laryngo-” (referring to the larynx) and “-malacia” (meaning softening of tissue), literally translating to soft larynx.

To illustrate this mechanism, a helpful analogy is trying to drink a thick milkshake through a wet, flimsy paper straw. As you inhale or suck, the negative pressure inside the straw causes its soft walls to collapse inward, blocking the flow. Similarly, when an infant with laryngomalacia inhales, the negative pressure created in their airway pulls the floppy tissues of their larynx downward and inward, obstructing the glottis (the opening to the windpipe).

The specific structures that collapse can vary, leading to different classifications of laryngomalacia. For example, some infants may have a long, curled epiglottis (often called an “omega-shaped” epiglottis) that prolapses posteriorly, while others may have bulky arytenoid cartilages that collapse anteriorly into the airway. This dynamic obstruction is why the noise is typically heard only on inhalation (inspiratory stridor) and not on exhalation.

What Are the Underlying Causes of Laryngomalacia?

The primary underlying cause of laryngomalacia is believed to be a delay in the maturation of neuromuscular control over the larynx, although anatomical variations and contributing factors like acid reflux also play significant roles.

It is not considered a defect in the cartilage itself but rather an immaturity of the nerves and muscles that are supposed to hold the airway open during the dynamic process of breathing. In a mature larynx, these muscles maintain sufficient tone to keep the laryngeal structures stiff and patent. In an infant with laryngomalacia, this neuromuscular tone is inadequate, leading to the characteristic floppiness and collapse during inspiration.

Beyond this central theory, several factors are known to contribute to or exacerbate the condition. Some infants are born with laryngeal structures that are anatomically predisposed to collapse. This can include a posteriorly-displaced epiglottis, shortened aryepiglottic folds that tether the epiglottis, or redundant mucosal tissue over the arytenoid cartilages. These structural differences reduce the margin for error, making even minor neuromuscular immaturity result in significant airway obstruction.

There is a strong and well-documented association between laryngomalacia and GERD, with some studies suggesting that up to 80% of infants with severe laryngomalacia also have significant reflux. The relationship is thought to be bidirectional.

The negative pressure created during obstructed breathing can pull stomach contents up into the esophagus. Conversely, acid reflux that reaches the larynx (laryngopharyngeal reflux) can cause inflammation, swelling, and irritation of the laryngeal tissues, worsening their floppiness and exacerbating the airway collapse.

In a smaller subset of cases, laryngomalacia is associated with broader neurological or neuromuscular conditions characterized by hypotonia (low muscle tone), such as cerebral palsy or certain genetic syndromes. In these instances, the laryngeal weakness is part of a more systemic lack of muscle tone.

6 Key Laryngomalacia Symptoms

Inspiratory Stridor

Inspiratory stridor is the hallmark symptom of laryngomalacia. It is a high-pitched, musical, or crowing sound that occurs specifically when the baby breathes in. This sound is produced by the vibration of the soft, floppy tissues of the supraglottic larynx as they are drawn into the airway by the negative pressure of inhalation.

The intensity and pitch of the stridor can vary significantly based on the infant’s activity level and position. It is typically louder and more pronounced when the infant is agitated, crying, excited, or feeding, as these activities require deeper and more forceful breaths, which increases the negative pressure and the degree of tissue collapse. Conversely, the stridor often lessens or disappears when the baby is calm, quiet, or asleep.

Position also plays a key role; the sound is characteristically worse when the infant is lying flat on their back (supine position) because gravity allows the epiglottis and other tissues to fall back more easily over the airway opening. It may improve when the baby is placed on their stomach or held upright.

Feeding Noises

In addition to stridor, infants with laryngomalacia often produce other audible noises during feeding, such as grunting, snorting, or gasping. These sounds arise because the act of feeding – sucking, swallowing, and breathing – must be intricately coordinated. For an infant with a partially obstructed airway, this coordination becomes a significant challenge.

As the baby works to draw in milk and breathe simultaneously, the increased respiratory effort can exacerbate the laryngeal collapse, leading to these distinct noises. The infant may sound congested or seem to be struggling to catch their breath between sucks.

These feeding noises are an important indicator that the airway obstruction is impacting one of the infant’s most vital functions and can often be a precursor to more significant feeding difficulties.

Suprasternal and Sternal Retractions

Retractions are the visible sinking or pulling in of the skin around the bones of the chest and neck during inhalation. In laryngomalacia, this is a direct sign that the infant is working harder than normal to breathe.

To overcome the airway obstruction, the infant must generate much greater negative pressure in their chest, using their diaphragm and accessory respiratory muscles more forcefully. This intense effort causes the flexible parts of the chest wall to be sucked inward.

Common areas to observe retractions include suprasternal, the soft, hollow area at the base of the neck, just above the breastbone (sternum); sternal, the breastbone itself may appear to sink inward, intercostal, the skin and muscles between the ribs pull in, and subcostal, the area just below the rib cage.

Mild retractions may only be present when the infant is crying or feeding. However, moderate to severe retractions that are present even when the infant is calm are a sign of significant airway obstruction and warrant medical evaluation. They visually demonstrate the amount of energy the baby is using just to breathe.

Cyanosis (Rarely)

Cyanosis is a bluish or purplish discoloration of the skin, lips, tongue, or nail beds. It is a very serious and urgent symptom that indicates a significant lack of oxygen in the blood (hypoxia). Cyanosis is not a feature of mild or even most moderate cases of laryngomalacia. Its presence signifies that the airway obstruction is so severe that the infant is unable to draw in enough oxygen to meet their body’s needs.

This may occur during periods of extreme agitation, feeding, or if the infant experiences an episode of apnea (a pause in breathing). Any instance of cyanosis, even if it is brief and resolves on its own, is a medical emergency. It requires an immediate visit to the emergency room or a call to emergency services, as it points to life-threatening respiratory distress.

Difficulty Feeding

For an infant with moderate to severe laryngomalacia, feeding can be an exhausting and stressful process. The core issue is the difficulty in coordinating sucking, swallowing, and breathing. A healthy infant can manage this rhythm seamlessly, but when breathing is obstructed, the cycle is disrupted. This leads to a range of observable behaviors during nursing or bottle-feeding.

The baby may frequently pull away from the breast or bottle, gasping for air. They might choke, gag, or sputter on the milk because they cannot clear their airway effectively while swallowing. Feeds may become very lengthy, with the infant tiring out before consuming a full volume.

In some cases, the infant may develop a feeding aversion, associating eating with the uncomfortable sensation of being unable to breathe properly. This can lead to arching of the back, crying, and refusal to feed, further compromising their nutritional intake. These difficulties are often accompanied by increased stridor and retractions during the feed.

Poor Weight Gain (Failure to Thrive)

Poor weight gain is a direct and serious consequence of the combined effects of increased energy expenditure and decreased caloric intake. This condition, medically termed “failure to thrive,” occurs when an infant’s weight or rate of weight gain is significantly below that of other children of similar age and gender.

The constant effort of breathing against an obstruction is like running a marathon 24/7. The work of breathing can increase an infant’s metabolic rate and caloric needs by as much as 30-40%. They are burning far more calories than a healthy baby just to perform the basic function of respiration.

As described above, feeding difficulties mean the infant may be physically unable to consume enough milk to meet even their baseline needs, let alone the increased demand caused by their respiratory effort.

When calorie expenditure outpaces calorie intake, the infant will fail to gain weight appropriately and may even lose weight. This is a significant red flag that the laryngomalacia is severe and requires medical intervention to ensure the child’s proper growth and development.

When to Seek Medical Help?

Whether laryngomalacia symptoms warrant immediate medical help depends entirely on their severity; while mild, intermittent stridor is common, red-flag symptoms like cyanosis, severe retractions, breathing pauses, or significant feeding refusal require urgent evaluation. It is crucial for parents to learn how to distinguish between benign symptoms and signs of true respiratory distress.

Most infants with laryngomalacia (around 90%) have a mild form of the condition. In these cases, the baby has noisy breathing that worsens with crying or agitation but is otherwise a happy spitter, content, feeding well, meeting developmental milestones, and gaining weight appropriately. These cases can typically be managed with observation at home, positioning strategies (e.g., keeping the baby upright after feeds), and often, medication for co-existing acid reflux. Regular check-ups with a pediatrician are sufficient to monitor progress.

However, a different approach is needed for severe symptoms, which signal that the infant’s airway is significantly compromised. Parents should seek immediate medical help, either by contacting their doctor urgently or going to the nearest emergency room, if they observe any of the following.

Specifically, cyanosis is any episode where the baby’s lips, tongue, or skin turn a bluish color. This is a sign of oxygen deprivation and is always an emergency. Apnea is any observed pauses in breathing, where the baby stops breathing for several seconds.

Next, severe retractions are deep, persistent pulling in of the neck, chest, or ribs that is present even when the baby is calm. This indicates the baby is in significant respiratory distress. If the baby is choking or gagging so much that they cannot eat, refuses to feed, or is showing signs of dehydration (e.g., fewer wet diapers), it is a medical concern.

Extreme lethargy or irritability is a significant change in the baby’s demeanor, such as becoming floppy, unresponsive, or inconsolably irritable, can be a sign of exhaustion from the work of breathing.

In summary, the decision to seek immediate help is not based on the presence of stridor alone, but on the constellation of symptoms that point to how well the infant is compensating. Trusting parental instinct is paramount; if a caregiver is worried that their baby is struggling to breathe, that concern should always be taken seriously and evaluated by a medical professional.

Laryngomalacia Diagnosis

The definitive method for diagnosing laryngomalacia is a procedure called flexible fiberoptic laryngoscopy. This is the gold standard because it allows the specialist to directly visualize the infant’s larynx and vocal cords in real-time while the baby is awake and breathing.

During the procedure, the infant is held securely by a parent or nurse while the doctor gently passes a very thin, flexible tube with a tiny camera and light on its end through the baby’s nostril and down into the throat. This process is very quick, usually lasting less than a minute, and while it may cause some temporary discomfort or gagging, it is not painful.

The specialist observes the structures of the larynx, known as the supraglottis, as the infant inhales. A positive diagnosis is confirmed when the doctor sees the characteristic inward collapse of these soft tissues, which obstructs the airway and produces the tell-tale stridor sound. This direct view is crucial for confirming the condition and ruling out other potential causes of noisy breathing.

This diagnostic procedure provides essential information beyond a simple confirmation, allowing the specialist to assess the severity and specific nature of the collapse.

Different Types of Laryngomalacia

Laryngomalacia is classified into different types based on which specific parts of the supraglottic larynx (the area above the vocal cords) are collapsing inward during inhalation. Understanding these types helps clinicians pinpoint the exact source of the obstruction.

While there can be overlap, the condition is generally categorized into three primary types. Type 1 involves the prolapse of the aryepiglottic folds, which are small flaps of tissue. In this type, the mucosa overlying the arytenoid cartilages, located at the back of the larynx, is redundant and gets sucked into the airway with each breath.

Type 2 is characterized by foreshortened or tight aryepiglottic folds. These tight folds tether the epiglottis, the flap that covers the windpipe, causing it to curl on itself (become omega-shaped) and obstruct the airway.

Lastly, Type 3 involves the posterior collapse of a floppy epiglottis itself. In this variation, the entire epiglottis is structurally weak and falls backward during inspiration, covering the opening of the airway.

Laryngomalacia and Other Infant Breathing Conditions like Tracheomalacia

Although both laryngomalacia and tracheomalacia cause noisy breathing in infants due to the collapse of soft tissues, they are distinct conditions affecting different parts of the airway.

The primary difference lies in the location of the collapse. Laryngomalacia occurs in the larynx, or voice box, which is the upper part of the airway. The stridor sound is produced when the soft tissues above the vocal cords collapse inward during inhalation. In contrast, tracheomalacia involves the trachea, or windpipe, which is the tube that leads from the larynx to the lungs.

In this condition, the cartilage of the windpipe is weak and collapses, particularly during exhalation or coughing. This difference in location leads to distinct sounds. The stridor from laryngomalacia is typically high-pitched and occurs on inspiration. The sound from tracheomalacia is often a lower-pitched, rattling noise or a barky cough that is more pronounced when the baby is exhaling, crying, or agitated.

A specialist can often distinguish between them based on these auditory cues, but a definitive diagnosis requires imaging or direct visualization of the respective airway structures. Further clarifying the distinctions between these two conditions is crucial for accurate diagnosis and management, as their treatments and prognoses differ.

What is a Supraglottoplasty and When is This Surgery Considered?

A supraglottoplasty is a precise, minimally invasive surgical procedure performed to correct severe laryngomalacia. The surgery is conducted through the mouth using microsurgical instruments and a laryngoscope, so no external incisions are made. The primary goal is to trim the excess, floppy tissue in the supraglottic area that is collapsing and obstructing the airway.

Depending on the type of laryngomalacia, the surgeon may trim the aryepiglottic folds, remove redundant tissue over the arytenoid cartilages, or adjust the position of the epiglottis.

By creating a wider, more stable opening to the airway, the surgery alleviates the obstruction and allows the infant to breathe more easily. It is important to emphasize that this intervention is reserved for a small percentage of infants with the condition, as over 90% of cases are mild and resolve on their own without any medical treatment.

Surgery is only considered when laryngomalacia causes significant, life-impacting complications that pose a risk to the infant’s health and development. Severe breathing difficulties includes significant airway obstruction leading to cyanosis (turning blue), life-threatening apnea (pauses in breathing), or severe retractions where the chest sinks in deeply with each breath.

If the breathing difficulty is so severe that it interferes with the infant’s ability to feed, leading to poor weight gain, choking or gagging during meals, and a failure to meet developmental milestones.

Also, the presence of severe gastroesophageal reflux disease (GERD) that does not respond to medication, or the development of complications like pulmonary hypertension or cor pulmonale (heart problems due to lung issues), may necessitate surgical intervention.

FAQs

1. Does laryngomalacia go away on its own?

Yes, in many cases, laryngomalacia improves on its own as a baby grows. The condition happens because the tissues around the voice box are softer than usual, but these tissues typically become stronger and more developed over time.

For many infants, symptoms gradually become less noticeable and often resolve by the time they are between 12 and 24 months old. However, some babies may have more significant symptoms, such as feeding problems, poor weight gain, or breathing difficulties, which may require closer monitoring or treatment from a healthcare provider.

2. What is the best position to feed a baby with laryngomalacia?

Many babies with laryngomalacia feed more comfortably when they are held in a more upright position. Keeping the baby’s head and neck supported may help improve breathing and swallowing coordination during feeding.

Smaller, more frequent feeds and allowing pauses during feeding can also be helpful for some infants. If a baby coughs, chokes, becomes tired during feeds, or struggles to gain weight, parents should discuss feeding strategies with a pediatric healthcare professional.

3. Does laryngomalacia sound like congestion?

Laryngomalacia can sometimes be mistaken for congestion because both conditions may cause noisy breathing. However, the sound is usually different. Laryngomalacia often causes a high-pitched breathing noise called stridor, which is produced when air moves through the narrowed upper airway. The sound may become louder when a baby is crying, feeding, excited, or lying on their back. Congestion, on the other hand, is usually caused by mucus blocking the nose and often sounds more like snuffling or a stuffy nose.

4. Can babies with laryngomalacia sleep on their back?

Yes, babies with laryngomalacia should generally continue to sleep on their back unless a healthcare provider gives different instructions. Back sleeping remains the recommended safe sleep position for infants.

Although some parents notice louder breathing sounds when their baby is lying down, changing sleep positions without medical advice is not recommended. Creating a safe sleep environment and attending regular checkups are important parts of caring for a baby with laryngomalacia.

5. Do all babies with laryngomalacia have reflux?

No, not every baby with laryngomalacia has reflux, but the two conditions can occur together. Some infants with laryngomalacia may experience gastroesophageal reflux, where stomach contents move back into the esophagus and sometimes irritate the throat and airway.

Reflux may make breathing noises or feeding discomfort more noticeable in some babies, but having laryngomalacia does not automatically mean a baby has reflux.

6. Do babies with laryngomalacia choke more?

Some babies with laryngomalacia may have a higher chance of feeding difficulties, including coughing, choking, gagging, or taking longer to finish feeds. This can happen because breathing and swallowing may be harder to coordinate when the airway is affected.

Not every baby will experience these problems, especially in mild cases. If choking happens frequently or feeding becomes stressful, a pediatrician may evaluate swallowing and recommend additional support.

7. Can kids with laryngomalacia talk?

Yes, most children with laryngomalacia develop speech normally. The condition affects the airway structures around the voice box, not the brain or a child’s ability to learn language.

As the airway matures, breathing symptoms usually improve, and most children continue to develop normal communication skills. In more complex cases, doctors may monitor speech, feeding, and development to ensure the child is progressing well.

8. Does crying make laryngomalacia worse?

Crying can make laryngomalacia symptoms sound louder because it increases airflow and activity in the airway. Parents may notice more noticeable noisy breathing when their baby is crying, feeding, excited, or upset. This does not always mean the condition is getting worse. However, if crying consistently leads to severe breathing difficulty, color changes, or extreme distress, medical advice should be sought.

9. Does laryngomalacia affect the brain?

No, laryngomalacia does not directly affect the brain. It is a structural condition involving the soft tissues of the upper airway, not a neurological disorder. Most babies with laryngomalacia have normal brain development and can grow, learn, and reach developmental milestones normally. Concerns about development should still be discussed with a pediatric healthcare provider if they arise.

10. Is laryngomalacia linked to SIDS?

Laryngomalacia is not considered a direct cause of sudden infant death syndrome (SIDS). Many babies with mild laryngomalacia grow and develop normally with routine monitoring.

However, infants with more severe airway obstruction or feeding-related complications may need closer medical follow-up. Following safe sleep recommendations, including placing babies on their backs to sleep, remains important for reducing sleep-related risks.

Conclusion

Laryngomalacia is a common condition in babies that can cause noisy breathing and other symptoms related to the upper airway. While hearing unusual breathing sounds can be concerning for parents, many infants experience mild cases that improve naturally as they grow.

Recognizing the warning signs, including feeding difficulties, breathing changes, and problems with growth, can help parents know when to seek medical guidance. With proper monitoring and support, most children with laryngomalacia continue to develop normally.

Understanding this condition can help parents feel more prepared and confident when managing their baby’s symptoms. If breathing or feeding concerns continue, discussing them with a healthcare professional can help ensure the child receives appropriate care and support.

References

• JOANNA WALTON – Laryngomalacia in infants
• Boston Children’s Hospital – Laryngomalacia (Laryngealmalacia)
• NHS – Laryngomalacia Information for Parents and Carers 
• Nationwide Children’s Hospital – Laryngomalacia
• Miracle Babies – Laryngomalacia
• The Johns Hopkins University – Laryngomalacia
• What is Laryngomalacia?
• MPENTA – Understanding Laryngomalacia: The Most Common Cause of Noisy Breathing in Infants
• Cincinnati Children’s Hospital Medical Center – Laryngomalacia Infantile
• UMMC – Laryngomalacia
• KidsHealth – Laryngomalacia
• American Thoracic Society – What Is Laryngomalacia?