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Health & Fitness

March 16, 2013

Medical Edge: Sleep study helpful, but not the first step in explaining fatigue


Untreated sleep disorders can have a big effect on a child’s quality of life. Often children with sleep problems are tired, grumpy and inattentive at school. They also may have mood swings and show symptoms of hyperactivity. In some cases, children may even be misdiagnosed with attention deficit disorder.

The most common sleep disorder in children is obstructive sleep apnea. In many children, large tonsils that block the upper airway during sleep cause sleep apnea. A child with sleep apnea may snore, sleep restlessly, have problems breathing and wake frequently during the night. Removing the tonsils often solves the problem. However, some children may need a device called a continuous positive airway pressure, or CPAP, machine to help them breathe well when they sleep.

Restless legs syndrome frequently causes daytime sleepiness. Children with this disorder have creepy, crawly feelings in their legs at night that get worse if they keep their legs still. If they move their legs, the feeling temporarily goes away. Children with restless legs syndrome may wake hundreds of times during the night. As a result, even if they seem to sleep for eight to nine hours, they still feel very tired in the morning.

Narcolepsy —  a sleep disorder characterized by overwhelming daytime drowsiness and sudden attacks of sleep —  also can affect children. Sleep terrors, nightmares and sleep walking may lead to daytime sleepiness for some kids. Common disorders such as depression and anxiety can disrupt sleep, as well.

Investigating sleep problems and finding the cause depend heavily on a child’s symptoms and situation. It has become common for some sleep labs to perform sleep studies without a doctor actually seeing the patient. We do not use that approach at Mayo Clinic, nor do we recommend it.

If you go to a sleep center, it should be accredited by the American Board of Sleep Medicine. Make sure the sleep medicine specialist you consult is also board certified by the American Board of Sleep Medicine. Sleep specialists come from a variety of medical backgrounds, including neurology, pulmonary medicine and psychiatry. In your situation, it would be best to find a specialist with experience in pediatric sleep medicine. —  Suresh Kotagal, M.D., Center for Sleep Medicine, Mayo Clinic, Rochester, Minn.

Medical Edge from Mayo Clinic is an educational resource and doesn’t replace regular medical care. Email a question to For more information, visit

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