Insomnia is a major health killer. No matter how healthy you are, if insomnia comes to your door one day, then it is ringing the alarm bell for your health. Li Jun, Psychiatry Department, Shanghai Mental Health Center Insomnia makes people’s quality of life much worse. People are prone to dizziness, weakness, even irritability and extreme temper tantrums after insomnia. The butterfly effect is formed, which seriously affects people’s work efficiency and interpersonal relationships. At the same time insomnia is a precursor to many diseases psychiatry. In psychiatric outpatient clinics and wards, family members often provide medical histories stating that the first abnormality to appear is insomnia, which is followed by a gradual onset of mental abnormalities. In chronic psychiatric patients, insomnia is also the first manifestation of a recurrent illness. There are many people suffering from insomnia, even young adults. What is the cause of insomnia? In terms of physiology, sleep has a biological rhythm, which is regulated by a variety of chemicals in the body, such as melatonin, forming a state of equilibrium. Once the balance is broken, there is a series of physiological problems such as endocrine disorders, affecting health; in the psychological aspect, there is a great relationship with the personality of the person, anxious people generally take sleep very seriously, if there is a bad night sleep will produce anxiety, that is, in the next night and worry about tonight is not a good sleep, forming a nasty cycle. Obviously anxiety and insomnia form a strange circle, not to break this circle can not be good to improve sleep. Of course, there is also the social aspect, today’s competitive pressure, many people by squeezing their own rest time to work overtime. Life is irregular, sleep is also irregular, and finally lead to insomnia.