Previously, insomnia was generally considered to be a clinical symptom rather than a disease. In the last decade, with the increasing incidence of insomnia, the growing awareness of insomnia and the establishment and development of sleep medicine, insomnia as an independent disease has received more and more attention from researchers in life medicine. If people have a day or a few days of bad sleep in their daily life, this cannot be considered as having insomnia, and sleep will generally return to normal naturally through their own adjustment. The diagnosis of insomnia can only be considered if insomnia occurs repeatedly and lasts for a period of time, with significant daytime discomfort. Insomnia diagnosis criteria are as follows: 1. Insomnia at night, including difficulty falling asleep, poor sleep, intermittent wakefulness, multiple dreams, early wakefulness, difficulty going back to sleep, poor feeling after waking up, etc. 2.The above insomnia symptoms occur at least three times a week and last for one month or more. 3.There are obvious symptoms of discomfort during the day, such as fatigue, dizziness and swelling, dry mouth and bitterness, panic and distress, which affect the quality of life and the function of social activities such as work and study. 4.The above insomnia symptoms are not part of the symptoms of any kind of physical or mental diseases.