There is a relationship between the sleep time of a newborn and the time after birth. Generally, the first day of sleep after birth is 18-21 hours, after the second day the sleep time is gradually shortened, usually around 16-20 hours, and after seven days the child’s sleep time continues to shorten, usually around 15-18 hours. There are individual differences in this sleep duration. In addition, according to the time of each sleep, generally speaking, each sleep should not be more than 3-4 hours, each sleep a few minutes, tens of minutes to about 3 hours is normal. Because he has to wake up for breastfeeding, if it is longer than that, consider that the child may have drowsiness. If the child sleeps for a long time every day and every time he sleeps for a long time, and there are abnormalities in the child’s spirit, breastfeeding, urination and defecation, or if the child has abnormal manifestations, such as increased muscle tone, increased neural excitability or decreased neural excitability, double gaze, strabismus, or any other abnormalities, it is considered that the child may be sick, and the more common ones are hypoglycemia in newborns, suppurative meningitis, Hypoxic-ischemic encephalopathy, intracranial hemorrhage and so on.