For this study, 90 children with headache and sleep problems underwent a polysomnogram, a sleep test that monitors the brain, eye movements, muscle activity, heart rhythm, and breathing. Of the participants, 60 had a migraine, 11 had a chronic daily headache, six had a tension headache and 13 had a non-specific headache.

The study found the children with a migraine were twice as likely as the other children in the study to have OSA. A sleep-related breathing disorder (SRBD) was found in 56 percent of the children with a migraine versus 30 percent of the children with a non-migraine headache. A severe migraine was also associated with shorter total sleep time, longer total time to fall asleep, and shorter REM sleep.

"Sleeping problems can exacerbate the problems a migraine causes on a child's health and may hinder a child's performance at school," said Sanjeev Kothare, MD, senior author of the study. "Parents and doctors need to be aware of the strong likelihood of sleep disorders in children with a migraine and seek appropriate preventions and treatments."

The study also found that 50 percent of children with tension headache grind their teeth at night, compared to 2.4 percent of children with a non-tension headache. In addition, an SRBD was also frequent in children with a non-specific headache and in children who were overweight.

The study was conducted at St. Christopher Hospital for Children, Drexel University, in Philadelphia, Pennsylvania. Dr. Kothare is currently at Harvard Medical School, Children's Hospital in Boston.

OSA is an SRBD that causes your body to stop breathing during sleep. OSA occurs when the tissue in the back of the throat collapses and blocks the airway. This keeps air from getting into the lungs. OSA occurs in about two percent of young children. It can develop in children at any age, but it is most common in pre-schoolers. OSA often occurs between the ages of three and six years when the tonsils and adenoids are large compared to the throat. OSA appears to occur at the same rate in young boys and girls. OSA also is common in children who are obese, and is more likely to occur in a child who has a family member with OSA.

Sleep-related bruxism involves the grinding or clenching of teeth during sleep. It is common for the jaw to contract while you sleep. When these contractions are too strong, they produce the sound of tooth grinding. This can cause dental damage by wearing the teeth down. In most severe cases, hundreds of events can occur during the night. In milder cases, the grinding may vary from night to night.

The rate of bruxism seems to be highest in children. About 14 to 17 percent of children have it. It can begin as soon as a child's upper and lower teeth have come through the gums. Around one third of children with bruxism will still have it when they are adults.

It can also be caused by stress and anxiety. This may be due to a life event or pressure at school or work.

Note: If no author is given, the source is cited instead.

• Sleep Disorder Research
• Headache Research
• Children's Health

• Obstructive Sleep Apnea
• Sleep Disorders
• Headaches

• Tension headache
• Cluster headache
• Separation anxiety disorder
• Circadian rhythm sleep disorder
• Night terror
• Bruxism