There are many reasons for insomnia in children, as follows: 1, too tired to play during the day, affecting sleep at night; 2, daytime sleepiness: too much sleep, day and night upside down, affecting sleep; 3, frequent breastfeeding at night: resulting in restless sleep, resulting in insomnia; 4, sleep with other people, if another person, the affected child also can not sleep; 5, sleep with the lights on: when the lights are turned off the affected child also can not sleep, will also affect sleep; 6 The child’s sleep will be affected by the presence of encephalitis and meningitis; 9. Attention deficit hyperactivity disorder, obstructive sleep apnea syndrome, and adenoid hypertrophy blocking breathing will affect the child’s sleep.