Anxiety is not a disease, but a normal response of the body and mind, and can be understood as a defense mechanism. It allows the organism and psyche to be more alert to deal with possible dangers that may come. In ancient times, when ancestors were threatened by natural disasters, such as volcanic eruptions and earthquakes, or besieged by wild animals, anxiety would arise. This anxiety will make the body become more sensitive, will make the mind work faster, to better cope with the upcoming critical moments. So anxiety is not a disease, the appropriate anxiety but help to improve efficiency and complete the work on the difficult. But there is a degree of anxiety, if the anxiety is excessive, such as excessive worry, and accompanied by symptoms of autonomic disorders. Whenever you worry, you will have palpitations, find it difficult to breathe, and even in severe cases, you will have a sense of near death, feeling restless and restless. At this time, if it affects the reality of work and life and does more harm than good, this is the time to consider excessive anxiety reaching the level of anxiety disorder. Anxiety disorder is a common mental illness that requires medication and, if necessary, combined psychotherapy. Therefore, anxiety is not a disease, but excessive anxiety becomes an anxiety disorder, and a disease is formed.