Patients in the night sleep suddenly can not sleep for the following reasons to consider: 1, may have to do with the patient’s mental, psychological factors, if the patient’s mental stress is relatively large will be easy to fall asleep difficulty. If the patient’s mood is more negative or anxious, it is easy to cause the above phenomenon to occur. 2, if the patient in the change of environment may lead to sleep at night, because for most people, in the familiar environment is easier to fall asleep. 3, the patient at night to sleep suddenly can not sleep to pay attention to whether there is a sudden stress psychological trauma, mental trauma caused by the patient in this case, the patient should be timely adjustment. If the patient is the night once in a while suddenly can’t sleep, don’t worry too much, if the night often can’t sleep, we suggest that the patient to find the triggers, for the improvement of the triggers, the patient’s sleep problems can be adjusted over.