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Joanna Clark Joanna Clark

Meltdowns to Milestones: How Sleep Affects Your Child's Development

Toddler tantrum laying on floor. From meltdowns to milestones. How sleep affects your child's development overlayed child's image/.

Today, let's delve into a topic that is close to my heart: the profound effects of sleep on our little ones' overall behavior and well-being. As a Pediatric Sleep Coach, I have had the privilege of guiding families towards restful nights and happier days. However, I have also witnessed firsthand the challenges that arise when a child doesn't get enough sleep. 

Many parent’s who reach out because their child is not sleeping are also noting that their child is experiencing some of the following.

  • Bed wetting

  • Resistance to transitions

  • Slow Learning orLearning disabilities

  • Night terrors

  • Hyperactivity/ impulsiveness ( My baby is active and “spazzy”)

  • Anxiety 

  • Behavior Issues

  • Clingy/separation anxiety

  • Irritable/Moody

  • Prone to illness

  • Not hitting developmental milestones

  • Can’t talk yet

  • Picky Eating & low appetite

  • Doesn’t nap well


Some of these issues could be caused by or magnified by insufficient sleep. Sleep plays a crucial role in a child's physical, emotional, and cognitive development. Adequate and restful sleep is essential for their overall well-being, behavior, learning abilities, and even their ability to regulate emotions and navigate daily challenges. While sleep doesn't solve all issues, it serves as a cornerstone for a child's health and development. 

Can you see how your Child's Sleep is  Impacting their Physical, Mental and Emotional Health?

  • Clingy/Separation Anxiety: When a child is overtired, they may become more clingy and fearful of separation from caregivers. This is often due to heightened emotions and a need for comfort and reassurance. Additionally, sleep disruptions can lead to feelings of insecurity, making it challenging for a child to feel safe when apart from loved ones.

  • Irritability/Moodiness: Perhaps one of the most common signs of inadequate sleep is irritability and moodiness. When a child is tired, they may become easily frustrated, have frequent meltdowns, and display unpredictable emotional reactions.

  • Prone to Illness: Sleep is vital for a healthy immune system. Children who do not get enough restful sleep may have weakened immune responses, making them more susceptible to illnesses such as colds, flu, and infections.

  • Not Hitting developmental Milestones: Adequate sleep is crucial for a child's growth and development, including reaching developmental milestones. When a child is sleep-deprived, their brain may not have enough restorative time to process and integrate new skills. This can result in delays in reaching milestones such as crawling, walking, talking, and other developmental achievements.

  • Delayed Speech Development (Can't Talk Yet): Sleep is essential for language development in young children. During sleep, the brain processes and consolidates new words and sounds. When a child is sleep-deprived, their ability to learn and retain language may be impaired, leading to delays in speech development.

  • Picky eating & low appetite : Sleep deprivation can affect appetite-regulating hormones, leading to changes in hunger cues. Some children may experience a decrease in appetite when they are tired, resulting in picky eating habits or reluctance to eat meals.

  • Bedwetting: Sleep plays a significant role in bladder control. Children who do not get enough restful sleep may have disruptions in their sleep cycles, including the deep sleep necessary to signal the brain to reduce urine production. This can lead to bedwetting, especially in children who are normally dry at night.

  • Resistance to Transitions: Children who do not get enough sleep may struggle with transitions, such as bedtime routines or changes in activities. This is because tiredness can make it difficult for them to shift focus or adapt to new situations.

  • Learning Disabilities: Chronic sleep deprivation can have a profound impact on cognitive function and learning. Children who do not get enough sleep may struggle with attention, memory, and problem-solving skills. This can result in difficulties in school, leading to challenges in academic performance and potential learning disabilities.

  • Night Terrors: Insufficient sleep can contribute to the occurrence of night terrors in children. Night terrors are intense episodes of fear and agitation that occur during deep sleep. When a child's sleep is disrupted or inadequate, they may be more prone to experiencing these frightening episodes.

  • Hyperactivity/Impulsiveness: Overtired children often display symptoms of hyperactivity and impulsiveness. This can be due to the body's attempt to combat fatigue by increasing adrenaline levels. The result is a child who seems constantly on the go, unable to settle down or focus on tasks. Sometimes parents feel they have an “active spazzy baby.” 

  • Anxiety: Insufficient sleep can contribute to feelings of anxiety in children. When they are overtired, their bodies produce stress hormones, which can lead to increased feelings of worry and nervousness. Over time, chronic sleep deprivation can exacerbate anxiety symptoms, making it more challenging for children to cope with everyday stressors.

  • Behavior Issues: Lack of sleep directly affects a child's behavior. When they are tired, they may become irritable, moody, and have difficulty regulating their emotions. This can manifest as temper tantrums, outbursts, and general defiance. Additionally, tired children often struggle to concentrate and follow instructions, leading to behavioral challenges in school and at home.

Solving your child’s sleep struggles helps establish a baseline from which to assess other concerns, ensuring that exhaustion is not magnifying existing issues. As parents and caregivers, ensuring that our children get the recommended amount of quality sleep each night is one of the most important things we can do to support their growth and thriving. It sets the stage for their success, resilience, and happiness both now and in the future.

If you've noticed any of these signs in your child, know that you're not alone, and support is available. As always, I'm here to offer guidance and personalized strategies to help your little one drift off to dreamland and wake up refreshed, ready to conquer the day.

Here is a free guide that lists out the recommended sleep goals for all the different ages and stages of your child up to age 6. 

Here's to peaceful nights and blissful days ahead!

The first step to see if I can help you achieve beautiful, blissful sleep is to schedule a 60 minute ZOOM sleep strategy session. Go to this link and complete the contact me form and I will be in touch within 24 hours with directions on how to schedule your Sleep Strategy Session.

Contact Me

If you are still wondering if I can help, please know I do NOT advocate 'cry-it-out'. I am a Gentle Sleep Coach. If you want to learn about my guilt-free and gentle process, please go to these links.

Blissful Baby Beliefs

The Gentle Sleep Process

The Blissful Baby Stairway to Sleep

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