Sleep isn't just rest; it's when critical brain development, memory consolidation, and physical growth happen. Children who get adequate sleep have better immune function, school performance, behavior, memory, and mental health.
Regularly sleeping fewer than the recommended hours is associated with attention, behavior, and learning problems. Insufficient sleep also increases the risk of accidents, injuries, hypertension, obesity, diabetes, and depression. Sleep-deprived children may be labeled as "troublemakers" or "lazy" when in reality they simply aren't getting enough sleep.
The American Academy of Sleep Medicine, endorsed by the American Academy of Pediatrics, recommends the following sleep amounts per 24-hour period:
Does your child resist bedtime or have frequent tantrums at night?
Do they have trouble falling asleep or staying asleep?
Does your child snore loudly, gasp, or have pauses in breathing during sleep?
Do they toss, turn, or seem restless throughout the night?
Is your child extremely difficult to wake in the morning?
Do they seem tired, irritable, or "wired" during the day?
Has your teen's sleep schedule shifted dramatically, staying up very late and struggling to wake for school?
Does your child complain of uncomfortable sensations in their legs at night or have restless legs during sleep?
Do they experience sleepwalking, sleep talking, or night terrors?
Is your child constantly fatigued despite seeming to get enough sleep?
Behavioral Insomnia of Childhood: The most common sleep problem, affecting 10-30% of children. This includes sleep-onset association disorder (a child can only fall asleep with specific conditions, like a parent present or being rocked) and limit-setting disorder (a child refuses or stalls at bedtime). These result from inconsistent parental limit-setting and improper sleep-onset associations. The good news: behavioral insomnia responds very well to behavioral interventions and parent education.
Obstructive Sleep Apnea (OSA): Affects 1-5% of children. Episodes of partial or complete upper airway obstruction during sleep cause disrupted sleep and oxygen desaturation. Symptoms include loud snoring, gasping, pauses in breathing, restless sleep, mouth breathing, and daytime sleepiness or behavioral problems. Enlarged tonsils and adenoids are a common cause. OSA requires evaluation with polysomnography (sleep study); history and physical exam alone are not adequate for diagnosis.
Delayed Sleep Phase Syndrome: Common in teenagers due to biological shifts in circadian rhythm at puberty. Teens naturally want to go to bed later and wake later, but early school start times conflict with this biology. The result is chronic sleep deprivation during the school week.
Restless Legs Syndrome (RLS) and Periodic Limb Movement Disorder: RLS causes an uncomfortable urge to move the legs, typically worse at night and when trying to rest. Children may have difficulty describing the sensation and may present with other sleep complaints or behavioral concerns. RLS has a strong association with ADHD. Iron deficiency is implicated in both conditions, as iron is a cofactor for dopamine synthesis, and the brain dopamine system plays an important role in both RLS and ADHD.
Parasomnias: Sleepwalking, sleep talking, and night terrors are disorders of arousal where part of the brain is "awake" while other parts remain asleep. These can occur in healthy children and are often triggered by insufficient sleep, sleep apnea, or physical/emotional stress. Treatment includes maintaining a safe sleep environment and addressing underlying causes.
Sleep and mental health have a powerful bidirectional relationship. Poor sleep leads to poor mental health, and poor mental health leads to poor sleep. This can become a vicious cycle.
ADHD: Children with ADHD have very high rates of sleep problems, delayed sleep onset, frequent nighttime awakenings, morning fatigue, and daytime sleepiness. Sleep deprivation worsens inattention and emotional dysregulation, while evening hyperactivity and impulsivity make it harder to fall asleep. Some researchers have even proposed that hyperactivity may be an adaptive behavior against underlying daytime sleepiness.
Anxiety: Anxiety disorders are strongly associated with insomnia. Hypervigilant states promote difficulty falling and staying asleep. A prior history of anxiety disorder is a risk factor for developing insomnia.
Depression: Depression commonly causes insomnia or excessive sleeping. Ongoing sleep deprivation worsens depression and can blunt the benefits of therapy and medication. Treatment of depression and comorbid insomnia requires addressing both.
Autism Spectrum Disorder: Up to 75% of children with autism experience sleep problems, compared to 3-36% of typically developing children. The causes are multifactorial, including disturbances in serotonin and melatonin, abnormal sensitivity to environmental stimuli, and difficulty establishing bedtime routines.
Sleep problems don't always have obvious causes. A functional medicine approach looks beyond the surface to identify what might be disrupting your child's sleep:
Iron Deficiency: Iron plays a critical role in sleep regulation and brain function. Studies show that 94% of children referred to sleep clinics have iron deficiency. Iron deficiency is strongly linked to restless legs syndrome, periodic limb movements, restless sleep, and ADHD. Children with ADHD have significantly lower ferritin (iron storage) levels than children without ADHD. A family history of iron deficiency increases the risk of sleep disorders. Pharmacologic management of RLS typically begins with treating iron deficiency if ferritin is below 50 ng/mL.
Vitamin D: Vitamin D deficiency has been associated with sleep disorders including decreased sleep duration, poor sleep quality, and sleep apnea. Children with vitamin D deficiency have been shown to have less total sleep time, poorer sleep efficiency, and later bedtimes than children with adequate vitamin D.
Thyroid Function: Both hypothyroidism and hyperthyroidism can disrupt sleep. Thyroid dysfunction can cause fatigue, sleep disturbances, and symptoms that mimic other conditions.
Inflammation: Chronic inflammation can disrupt iron homeostasis and affect sleep. Children with sleep-disordered breathing often have lower iron levels, possibly because sleep-disordered breathing causes inflammation that affects the body's ability to maintain adequate iron.
Allergies and Food Sensitivities: Allergies and food sensitivities have been associated with restless sleep and sleep disturbances. Nasal congestion from allergies can contribute to sleep-disordered breathing.
A growing body of research links screen time to sleep problems in children and teens. Excessive use of electronic devices before bedtime is consistently associated with poorer sleep quality, shorter sleep duration, and longer time to fall asleep.
Screens affect sleep in several ways: the blue light suppresses melatonin production, stimulating content increases alertness and raises heart rate, and social media can create "fear of missing out" that keeps teens awake. Fast-paced imagery can disrupt both dream and non-dream sleep.
The American Academy of Pediatrics recommends avoiding screens for at least one hour before bedtime and not sleeping with devices in the bedroom. If one hour is too stringent, start with even 15-30 minutes of screen-free time before bed.
Sometimes children are profoundly fatigued even when getting adequate sleep. Persistent fatigue that doesn't improve with rest warrants medical evaluation. Possible causes include:
ME/CFS is a complex condition characterized by profound fatigue that worsens after physical or mental exertion (post-exertional malaise), along with unrefreshing sleep, cognitive difficulties, and pain. It affects children and adolescents as well as adults, with prevalence estimated at 0.1-0.5% in pediatric populations. Unlike typical fatigue, rest and sleep do not relieve symptoms. Adolescents with ME/CFS often experience significant dizziness and lightheadedness (orthostatic intolerance).
Behavioral Interventions: For behavioral insomnia, behavioral modifications and sleep hygiene are the primary treatment. Medications should NOT be considered before optimizing sleep hygiene and implementing behavioral changes. Behavioral interventions have been proven more effective than medication in generating long-lasting improvement. Cognitive behavioral therapy for insomnia (CBT-I) is effective for severe insomnia and does not involve medications.
Sleep Hygiene: Establish consistent bedtime and wake time (within one hour on weekends), create a calming bedtime routine, keep the bedroom cool/dark/quiet, remove screens from the bedroom, avoid caffeine after mid-afternoon, and ensure the bedroom is used for sleep rather than play or punishment.
Treating Underlying Conditions: If iron deficiency is identified, supplementation often improves restless legs symptoms and sleep quality. Treating allergies, addressing anxiety or depression, and managing ADHD can all improve sleep. For obstructive sleep apnea, adenotonsillectomy is the first-line treatment; CPAP may be needed if surgery is not appropriate or symptoms persist.
Melatonin: Melatonin is the most commonly used sleep aid in children and has the most research support, particularly for children with autism and other neurodevelopmental disorders. It helps with sleep onset and has a good safety profile for short-term use. However, it should be used as part of a comprehensive approach that includes behavioral strategies, not as a standalone solution.
Important note: There are NO FDA-approved medications for pediatric insomnia. All sleep medications used in children are off-label. Hypnotic medications are not recommended for behavioral insomnia. If medications are considered, they should be prescribed by a sleep specialist as part of a comprehensive treatment plan.
At Cedars Functional Medicine, we take a comprehensive approach to pediatric sleep problems and fatigue:
Detailed Sleep History: We gather information about bedtime routines, sleep patterns, nighttime behaviors, morning waking, and daytime functioning. We use validated questionnaires to screen for specific sleep disorders.
Screen for Underlying Conditions: We evaluate for ADHD, anxiety, depression, and other conditions that commonly co-occur with sleep problems.
Laboratory Evaluation: We check for iron deficiency (ferritin, iron panel, CBC), vitamin D, thyroid function, and inflammatory markers. Standard diagnostic evaluations often don't assess iron levels, but testing can significantly improve treatment outcomes.
Behavioral Support: We provide guidance on sleep hygiene, bedtime routines, and behavioral strategies tailored to your child's specific challenges.
Referral When Needed: Children who don't respond to behavioral interventions, have suspected sleep apnea, or have complex medical or developmental issues may need evaluation by a pediatric sleep specialist, including polysomnography (sleep study).
Your child's safety comes first. Seek evaluation promptly if your child:
Never start iron supplements without blood testing and your doctor's guidance. While iron deficiency is common, too much iron can be harmful. Iron can also interfere with absorption of other minerals.
For children with ME/CFS, vigorous exercise can worsen symptoms. Activity must be carefully balanced to avoid "push-and-crash" cycles.
Yes. Paradoxically, sleep-deprived children often appear hyperactive rather than sleepy. This "wired" behavior can actually be the body's way of fighting fatigue. Some researchers have even proposed that hyperactivity in ADHD may be an adaptive response to underlying sleepiness.
Melatonin can be helpful for some children, particularly those with delayed sleep phase or neurodevelopmental conditions. However, it works best as part of a comprehensive approach that includes good sleep hygiene and behavioral strategies. Melatonin is not a substitute for addressing underlying issues. Talk to your child's healthcare provider before starting melatonin.
No. At puberty, the circadian rhythm shifts up to two hours later, meaning teens naturally feel sleepy later and want to wake later. This biological shift, combined with early school start times, results in chronic sleep deprivation for many teenagers. The AAP has advocated for middle and high schools to start at 8:30 AM or later to better align with adolescent biology.
Yes. Iron deficiency is strongly linked to restless legs syndrome, restless sleep, and sleep disorders in children. One study found 94% of children in a sleep clinic had iron deficiency. Iron is essential for dopamine production, which plays a key role in sleep regulation. If your child has restless sleep, leg discomfort at night, or ADHD, checking ferritin levels is important.
A sleep study (polysomnography) is required to diagnose obstructive sleep apnea—history and physical exam alone are not adequate. Sleep studies may also be helpful for suspected periodic limb movement disorder, frequent awakenings, or treatment-resistant insomnia. Children who don't respond to behavioral interventions or have complex issues should be referred to a pediatric sleep specialist.
Insomnia is a common side effect of stimulant medications. However, it's important to establish baseline sleep patterns before starting medication to distinguish pre-existing insomnia from medication side effects. Newer and long-acting stimulant formulations may have less impact on sleep. Behavioral sleep interventions, adjusting medication timing, and treating underlying conditions like iron deficiency can all help.
The AAP recommends avoiding screens for at least one hour before bed. Screen light suppresses melatonin, and stimulating content keeps the brain alert. Social media is particularly disruptive to sleep. If an hour feels impossible, start with 15-30 minutes screen-free before bed, and try switching from interactive media (games, social media) to passive content (TV).
Persistent fatigue despite adequate sleep warrants medical evaluation. Possible causes include anemia, thyroid dysfunction, depression, chronic infection, or myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Sleep quality also matters—if sleep is fragmented due to sleep apnea, restless legs, or frequent awakenings, your child may not be getting restorative sleep even if the hours seem sufficient.
Night terrors (and sleepwalking) are parasomnias that can occur in healthy children. They're usually not dangerous, though you should ensure a safe sleep environment. Parasomnias are often triggered by insufficient sleep, sleep apnea, or stress. If they're frequent or disruptive, addressing these underlying factors often helps. Most children outgrow parasomnias.
Yes. Sleep history, evaluation of laboratory results and targeted guidance can all be done via telehealth. If a sleep study or in-person specialist evaluation is needed, we can help coordinate that referral.
You may also want to read about ADHD & Focus Issues, Anxiety, Worry & Panic in Kids, Depression in Children & Teens, Gut-Brain Symptoms, and Food Sensitivities & Nutrient Deficiencies, since these areas often overlap with sleep problems and fatigue.
Medically Reviewed By: Dr. Juliana Nahas, MD, FAAP, FMACP
ADD/ADHD
Conduct & Oppositional Disorders
Anxiety, Worry & Panic in Kids
Autism Spectrum Support
PANDAS / PANS
Immune-Triggered Neuropsychiatric Symptoms
OCD, Intrusive Thoughts & Compulsions
Mood Dysregulation
Depression
Sleep Issues & Fatigue in Children
Gut-Brain Symptoms
Food Sensitivities & Nutrient Deficiencies
Dr. Nahas’s private practice is 100% virtual and serves patients across the entire state of Florida. While the practice is registered in St. Petersburg, care is delivered remotely, allowing access to individuals and families throughout Florida without geographic restriction.