If the sleep import time exceeds half an hour at night, it is called difficulty in falling asleep, which is one of the most common manifestations of sleep disorders, mostly due to two causes: first, primary insomnia, also called non-organic primary insomnia, where the cause of the patient’s sleep difficulty is unknown, generally lasting more than three months, with at least three episodes per week, and can exclude anxiety, depression and other organic diseases in various parts of the body In this case, the patient simply shows difficulty in falling asleep, sometimes also accompanied by excessive dreaming, early awakening or difficulty in falling asleep after waking up. Secondly, anxiety and depression, which is one of the most common causes of difficulty sleeping, patients tend to be mainly anxious, there are too much chaos in the mind before going to bed, thinking about things, the brain can not be quiet, after going to sleep, there will also be obvious dreaming, perfect anxiety scale test its score is more than 40 points, presented as moderate to severe anxiety.