Patients clearly want to sleep but can not sleep for the following reasons to consider: 1, may be caused by environmental factors, such as the environment is more noisy easily lead to patients sleep difficulties. 2, and patients with mental, psychological factors, such as patients mood swings, mental stress is relatively large, repeatedly thinking about certain things inside will also lead to the patient can not sleep, sleep difficulties. 3, patients clearly want to sleep but Can not sleep, may be caused by the change of sleep environment, many people will have such habits. When the sleep environment changes there will be a problem of difficulty in falling asleep, or even not being able to sleep the whole night.