The reasons for waking up at night and can no longer sleep are the following: No. 1, because the sleep time is already enough, the average person who sleeps at noon is longer, often sleep at night to 4-5 o’clock has woken up, and can no longer sleep, because the normal adult sleep time of about 7 hours a day can be, noon sleep enough for 2 hours, at night if the bedtime is earlier, such as 10 o’clock or 11 o’clock If you go to bed early at night, such as 10 o’clock or 11 o’clock, 4-5 o’clock in the morning has been enough to sleep for 5 hours, so a wake up can not fall back to sleep is a normal phenomenon. No. 2, wake up at night can no longer sleep, may be due to mental factors, due to labor or mental stress, due to a certain event caused by stimulation, wake up at night to think about this thing or continue to think about certain things will not be easy to fall asleep again, you can adjust the mental aspects. No. 3, waking up at night and can no longer sleep, may also be caused by physical disease stimulation, such as pain in a place in the body or hypoglycemia, hunger and other circumstances, can lead to sleep no longer this situation, should promptly identify the cause, symptomatic treatment.