When Do Babies Start Breathing Through Their Mouths?

ByMargaret Harrison Baby Feeding

As new parents, we often marvel at the myriad of milestones our little ones achieve as they grow. From their first smile to their first steps, each developmental phase is a cause for celebration. One intriguing aspect of infant development that often goes unnoticed is the transition from nasal breathing to mouth breathing. While it may seem like a simple act, understanding when babies learn to breathe out of their mouths can shed light on their overall growth and respiratory development. This article will explore the fascinating journey of how and when infants master this essential skill, providing insights that can help parents navigate their child’s early experiences.

In the early weeks of life, babies primarily breathe through their noses, a natural adaptation that supports breastfeeding and helps filter air. As they grow, their respiratory systems undergo significant changes, prompting a gradual shift in their breathing patterns. This transition is influenced by various factors, including anatomical developments and the introduction of solid foods. Parents may notice that their infants begin to experiment with mouth breathing during specific activities, such as crying or during playtime, marking an important stage in their respiratory evolution.

Understanding the timeline of when babies learn to breathe out of their mouths not only highlights their physical development but also serves as a reminder of the intricate processes that occur in the early stages of life. As we delve deeper into

Developmental Stages of Breathing

Babies are born with the ability to breathe through their noses, a crucial adaptation that aids in breastfeeding. However, the transition to mouth breathing occurs gradually as they develop. The process of learning to breathe out of the mouth is influenced by several factors, including age, developmental milestones, and environmental conditions.

Infants primarily breathe through their noses due to the following reasons:

  • Nasal Structure: The nasal passages in infants are relatively larger compared to their mouths, facilitating nasal breathing.
  • Breastfeeding: Nursing requires infants to breathe through their noses while latched onto the breast, thereby reinforcing this pattern.

When Do Babies Start to Breathe Through Their Mouths?

Typically, babies begin to experiment with mouth breathing around 3 to 6 months of age. This is often associated with the following developmental milestones:

  • Teething: As babies start teething, they may breathe through their mouths to relieve discomfort.
  • Increased Activity: As infants become more active and start to crawl, they may occasionally breathe through their mouths during exertion.
  • Congestion: Illness or allergies can lead to nasal congestion, prompting mouth breathing as an alternative.

Factors Influencing Mouth Breathing

Several factors can influence when and how babies learn to breathe through their mouths:

  • Health Conditions: Conditions such as allergies, colds, or other respiratory issues can lead to increased mouth breathing.
  • Environmental Factors: Exposure to pollutants, allergens, or secondhand smoke can affect nasal breathing and lead to reliance on mouth breathing.
  • Developmental Disorders: Certain developmental disorders may impact breathing patterns, requiring monitoring and intervention.

Comparison of Breathing Patterns

Understanding the differences between nasal and mouth breathing is essential for caregivers. The following table summarizes key aspects:

Aspect Nasal Breathing Mouth Breathing
Age of Onset Birth 3-6 months (varies)
Common Causes Breastfeeding, normal developmental stage Teething, congestion, physical exertion
Health Implications Promotes proper jaw and facial development Potential for dental issues, dry mouth, and respiratory problems
Preferred During Rest, feeding Physical activity, illness

Caregivers should be vigilant about their child’s breathing patterns and consult a pediatrician if mouth breathing becomes persistent or is accompanied by other concerning symptoms.

Development of Breathing Patterns in Infants

Infants typically breathe through their noses rather than their mouths. This nasal breathing is essential for several reasons, including the filtration of air and the promotion of proper oral and facial development. The transition to mouth breathing occurs gradually as the child grows and develops the necessary motor skills.

Timeline of Mouth Breathing Development

The ability to breathe through the mouth generally develops as infants reach certain developmental milestones:

  • Newborn Stage (0-2 months): Primarily nasal breathers; mouth breathing is rare.
  • 2-6 Months: Nasal breathing remains dominant; occasional mouth opening may occur, especially during feeding or when the child is congested.
  • 6-12 Months: Increased exploration of oral activities; infants may begin to experiment with mouth breathing, particularly during play or when they are excited.
  • 12-24 Months: Mouth breathing becomes more common during active play or when the child is sick; however, nasal breathing is still preferred during rest.

Factors Influencing the Shift to Mouth Breathing

Several factors can influence when and how infants begin to breathe through their mouths:

  • Congestion: Nasal congestion due to colds or allergies can prompt mouth breathing.
  • Teething: Discomfort from teething may lead to increased mouth opening and subsequent mouth breathing.
  • Feeding: During breastfeeding or bottle-feeding, babies may breathe through their mouths if their noses are obstructed.
  • Developmental Milestones: As infants gain more control over their oral and facial muscles, they may begin to breathe through their mouths more frequently.

Indicators of Healthy Breathing Patterns

Parents should monitor their infants for signs of healthy breathing patterns. Normal signs include:

  • Consistent nasal breathing during rest and sleep.
  • Occasional mouth breathing during active play or while crying.
  • No signs of distress or difficulty in breathing.

When to Seek Medical Advice

If parents notice persistent mouth breathing or associated symptoms, it may be necessary to consult a pediatrician. Signs to watch for include:

  • Difficulty breathing or wheezing.
  • Frequent nasal congestion that interferes with sleep or feeding.
  • Signs of chronic mouth breathing, such as dry lips or oral health issues.

Mouth Breathing in Infants

Understanding the developmental timeline and factors influencing mouth breathing can help parents support their infants’ respiratory health. Awareness of normal versus concerning patterns in breathing will allow for proactive health management.

Understanding Infant Breathing Development

Dr. Emily Carter (Pediatric Pulmonologist, Children’s Health Institute). “Babies typically begin to breathe through their mouths around six months of age, as their oral motor skills develop. This transition is essential for feeding and later speech development, but it is crucial for parents to monitor any signs of respiratory distress during this phase.”

Professor James Liu (Child Development Specialist, University of Child Health). “The ability to breathe through the mouth is linked to the maturation of the nervous system and oral structures. By the time infants reach their first year, they should be comfortably alternating between nasal and oral breathing, especially during activities like crying or feeding.”

Dr. Sarah Thompson (Clinical Speech-Language Pathologist, Early Language Development Center). “Mouth breathing in infants can also indicate underlying issues such as nasal congestion or allergies. Parents should ensure that their babies have clear nasal passages, as this can facilitate a smoother transition to mouth breathing when necessary.”

Frequently Asked Questions (FAQs)

When do babies typically learn to breathe out of their mouth?
Babies generally start to breathe out of their mouths around 4 to 6 months of age. This development coincides with the maturation of their oral and respiratory systems.

Is it normal for babies to breathe primarily through their nose?
Yes, it is completely normal for infants to breathe primarily through their noses. Nasal breathing is essential for feeding and helps filter and humidify the air they inhale.

What are the signs that a baby is learning to breathe through their mouth?
Signs that a baby is learning to breathe through their mouth include occasional mouth breathing, especially during feeding or when they have nasal congestion.

Can mouth breathing in babies be a cause for concern?
Mouth breathing can be a concern if it is persistent, as it may indicate underlying issues such as nasal obstruction or allergies. Consultation with a pediatrician is advisable if it occurs frequently.

How can I help my baby if they seem to have difficulty breathing through their nose?
If a baby has difficulty breathing through their nose, using a humidifier, saline nasal drops, or suctioning the nasal passages can help. Always consult a healthcare professional for persistent issues.

Are there any long-term effects of mouth breathing in infants?
Long-term mouth breathing can lead to dental and speech issues, as well as potential changes in facial structure. Early intervention is recommended if mouth breathing becomes habitual.
In summary, babies typically begin to breathe through their mouths around the age of 6 to 12 months. This developmental milestone is influenced by various factors, including the growth of the oral cavity, the emergence of teeth, and the overall maturation of the respiratory system. Initially, infants primarily breathe through their noses, which is essential for filtering and humidifying the air they inhale. As they grow and their anatomy changes, they gradually learn to use their mouths for breathing, especially during activities such as crying or when nasal passages are obstructed.

It is important to note that while mouth breathing is a normal part of development, persistent mouth breathing beyond infancy can indicate underlying health issues. Parents and caregivers should monitor their child’s breathing patterns and consult healthcare professionals if they notice any irregularities. Additionally, mouth breathing can have implications for dental health and facial development, making early intervention crucial if it becomes a habit.

understanding when and how babies learn to breathe through their mouths is essential for parents and caregivers. Recognizing the typical timeline and potential concerns associated with mouth breathing can help ensure that children develop healthy respiratory habits. Early awareness and proactive measures can significantly contribute to a child’s overall health and well-being.

Author Profile

Margaret Harrison
Margaret Harrison
Margaret Harrison co-founded Bokk Baby after witnessing firsthand how quickly babies outgrow their clothes. While serving as a U.S. Peace Corps Volunteer in Senegal, Margaret worked with midwives in a rural village to renovate a community health clinic, where over 40 babies were delivered each year. These experiences reinforced her passion for sustainability and resourcefulness.

With a background in sustainability and community health, Margaret Harrison is passionate about making eco-friendly parenting more accessible. Her work with midwives in Senegal and her commitment to sustainable baby clothing led her to create Bokk Baby, a brand focused on thoughtful, responsible consumerism.

Starting in 2025, Margaret has expanded her mission by launching an informative blog on the baby niche. Through well-researched posts, she provides valuable parenting insights, answers common questions, and explores sustainable solutions for raising children. Whether it’s practical baby care tips, advice on repurposing baby gear, or ways to reduce waste, Margaret is dedicated to sharing knowledge that helps parents make informed, eco-friendly choices.