Depression, also known as depressive disorder, is characterized by significant and persistent depression and is the main type of mood disorder. The depressed mood can range from sullenness to grief, low self-esteem and depression, and even pessimism and anxiety, and there can be suicide attempts or behaviors; some cases have obvious anxiety and motor agitation; severe cases can have hallucinations, delusions and other psychotic symptoms. Some experts summarize depressive symptoms as six “no’s”, i.e. “no fun, no way, no ability, no hope, no meaning, no motivation. Studies have shown that 30-41.8% of depressed patients have a family history of genetic disorders, environmental factors, poor childhood upbringing, social environment, unpleasant life events, widowhood, divorce, marital discord, unemployment, job changes, serious physical illness, death of a family member or long-term psychological conflict, etc., can trigger depression. The main symptoms of depression include: depressed mood, slow thinking, reduced movement and other basic symptoms, while depressed mood is the most basic symptom, with the continuation and development of depressed mood, generally produce pathophysiological reactions, a series of physical symptoms in varying degrees, such as insomnia, chest tightness, rapid heartbeat, palpitations, pain in no fixed location, digestive system disorders (such as poor appetite, indigestion, constipation, etc.), sexual dysfunction, constipation, etc. sexual dysfunction, weight loss, etc. Secondary symptoms of depression include: some depression has depression and depression performance, the other side is agitation, easy to misdiagnose as anxiety; sometimes into the depression valley, can not be extricated; and sometimes back to the mood smooth, into a normal state; but immediately after the depression valley again this is related to the season, the environment.