At this stage, the social pressure is very high, the pace of life is very fast, so anxiety and insomnia will be more and more people mentioned. But what exactly is the cause of the biological and psychological and social aspects, specifically the following: 1, biological factors should first consider the genetic factors: with anxiety and insomnia of the family history is an individual suffering from anxiety disorders and insomnia risk factors. That is, when the parent generation has had anxiety and insomnia, the individual is also more likely to get anxiety and insomnia, which is determined by biological factors; 2, and neuroimaging factors: imaging studies have found that the larger the volume of the individual’s amygdala indicates that the individual is the quality of anxiety, and it is also easy to get anxiety and insomnia; 3, and neurochemical factors: when the individual’s concentration of 5-hydroxytryptophan is insufficient, the person will easily feel the anxiety, which is also the case with medication. Anxiety, which is also the basis of drug treatment; 4, in addition to biological factors, there are many psychological and social factors; excessive pressure will lead to anxiety, or can be said, anxiety is the very instinctive reaction of human beings to face pressure; moderate anxiety can help individuals to better face the pressure to mobilize the whole body energy to actively cope with and deal with the challenges in front of them. However, when the pressure is too great, beyond the individual’s ability to bear the burden, the anxiety level is high to a certain extent can not be borne, it is called pathological anxiety; pathological anxiety will induce the body very uncomfortable subjective feelings and somatic symptoms, this time it is necessary to clinical intervention, insomnia is also based on the triggering.