Depression is a huge danger to society and families, such as the inability to go to work, reduced ability to work, marital discord and parent-child relationship problems, and most importantly, the increased risk of suicide, self-injury, and even killing loved ones in depression. Worldwide, 340 million people suffer from depression, and between 10 and 20 million people attempt suicide each year. Five of the world’s top ten major disabling or incapacitating diseases are mental illnesses, with depression ranking first and causing great harm to society. Depression also places a heavy financial and psychological burden on families. Major depression can be highly disabling and incapacitating, while patients with mild to moderate depression can also have reduced social adjustment, and the disease is prone to relapse and requires long-term treatment. If patients and family members can eliminate the inferiority complex and actively seek medical treatment, if members of the society can abandon the discriminatory attitude and enthusiastically help and care for depressed patients, and if medical personnel are more familiar with the manifestations of depression, patients can get a clear diagnosis, timely treatment and a full dose and course of antidepressant treatment from the very beginning. The vast majority of depressed patients can get out of the depression dilemma and enjoy a normal life again, becoming a socially functional person. Some people say that depression is like a cold, which is very common, but depression is a great danger to individuals, families and society, so it should not be taken lightly and must be detected, diagnosed and treated early in order to recover as soon as possible.