1.Definition: Insomnia is a subjective experience in which the patient is not satisfied with sleep duration and/or quality and affects daytime social function, in the form of prolonged sleep latency, sleep maintenance disorder, decreased sleep quality, shortened total sleep time, and daytime residual effects. Anxiety disorders, also known as anxiety disorders or anxiety disorders, are a group of psychiatric disorders in which anxiety is the main clinical phase; they include panic disorder, social anxiety disorder, obsessive-compulsive disorder, generalized anxiety disorder, and post-traumatic stress disorder. Depressive disorders are characterized by significant and persistent depression as the main clinical feature, and the depression is disproportionate to its situation, clinical manifestations range from moping to grief, and even the occurrence of malaise can have significant anxiety and motor agitation; severe cases can appear hallucinations, delusions and other psychotic symptoms. A large-scale demographic study in France showed that the most common co-morbidities of insomnia are anxiety and depressive disorders. 2. Several studies have shown that the relationship between insomnia and depression and anxiety is bidirectional: depressive symptoms are present in 20% of insomnia patients, and anxiety symptoms are very common in patients with difficult-to-sleep insomnia. Depression or depressive symptoms may be the greatest risk factor for insomnia, and anxiety symptoms may predict future insomnia. The risk of developing depressive and anxiety disorders was 9.82 and 17.35 times higher, respectively, in insomnia patients compared to those without insomnia. The higher the degree of insomnia the higher the rate of developing anxiety disorders. Chronic insomnia is a hallmark characteristic of developing anxiety.