As society develops and becomes more competitive, the number of people suffering from anxiety disorders continues to rise. International epidemiological studies show that about 4.1-6.6% of people will suffer from anxiety disorders during their lifetime. A survey in China shows that 4.1% of people have suffered from anxiety disorders in their lifetime. Among them, the number of mental workers suffering from the disease is more than manual workers, and the incidence rate of women is higher than that of men. In the face of the increasing number of people suffering from anxiety disorders, researchers have been exploring the causes. So what exactly causes anxiety disorders? First of all, from a psychological point of view, which is by far the most important cause already, poor cognition, imbalance of ego, id, superego, unresolved conflicts from childhood, adolescence or adulthood emerge, and the reinforcement of anxiety conditioning are closely related to the occurrence of anxiety disorders. If another stressful event occurs in life, such as a natural or man-made disaster, it is more likely to trigger anxiety disorders. Because, in this process, psychological stress is not effectively released, which leads to continuous tension, panic, etc. The disruption of tension-related hormones, such as thyroxine and noradrenaline, can exacerbate the symptoms of anxiety. Second, biogenetic studies have shown that some genes are associated with anxiety disorders. Recent studies in the United States have shown that a gene codenamed “SLC6A4” may have an effect on the development of anxiety disorders. However, this effect is not the only determinant of anxiety disorders. Again, neurotransmitter imbalance may be the cause of anxiety disorders. Many studies have found that the levels of norepinephrine and serotonin in the brain change dramatically when patients are in a state of anxiety. However, researchers are still exploring whether such changes are a cause or a consequence of anxiety disorders. Finally, anxiety disorders are associated with palpitations, tremors, and excessive sweating, which are all signs of massive excitation of beta-adrenergic receptors. It is evident that beta-adrenergic receptors have a place in the pathogenesis of anxiety disorders. It has also been found that abnormalities in benzodiazepine receptors and γ-aminobutyric acid receptors are also associated with the development of anxiety disorders. In short, people need to actively work on the prevention of anxiety disorders from the causes in order to greatly reduce the probability of suffering from this disease, and it is also recommended to maintain an optimistic attitude in life and live each day well.