Depression is an extremely common psychological disorder, accounting for about 5% of the world’s population, with a suicide rate of 15%, ranking first among all types of psychological and mental disorders, known as the “number one killer”. People with depression have a very painful inner experience and are the “most negative, sad and miserable people” in the world. The clinical manifestation of depression is a group of syndromes, and there are many different kinds. Depressive mood: Depressed patients mainly show a sudden depression for no reason, or a depressed mood triggered by a certain event, and lose interest in life. At this time, nothing in life can attract their pleasure, even the most interesting hobbies in the past also equally tasteless. At this time, they see the world through “gray lenses”, everything is gray and dark, and anything that happens around them only evokes their infinite sadness. For this reason, they tend to live in isolation, do not interact with people, avoid all social activities. 2. Pessimistic thinking: Patients see their past, present and future with “gray eyes”. Reflecting on their past performance, they often blame themselves for some trivial things in the past, such as taking office supplies from the unit for petty reasons, exaggerating their “sins” and taking the initiative to turn themselves in. Or recall the past and feel that nothing has been accomplished. In real life, they only see the difficult and negative side, think that they have bad memory, “become stupid”, bad energy, “no strength”, become “a burden to their families and society, parasites “The patient has no confidence in life and feels incompetent. For the future, the patient will think that he or she has no future and is a failure, so he or she will be pessimistic and disappointed, blaming himself or herself, as if life has come to an end and the only way to get rid of it is to die, so he or she may develop suicidal thoughts and even commit suicide. 3. Loss of interest: Almost every patient has this experience and it occurs together with depressed mood. The main manifestation is the lack of interest in the past daily activities, if go like to watch theater now do not want to watch, the past like fishing now also do not want to go, or even become very cold. Patients lack interest in daily life and recreational activities, and feel no doubt, as if they have “seen the light of day”. 4. Decreased energy: Patients feel difficulty in concentration, memory loss, mental emptiness “like a paste”, and slow reaction. At the same time, there is a decline in physical strength, such as easy fatigue, general weakness. Inability to perform the original work, work efficiency is significantly reduced, such as a diligent housewife does not want to brush the dishes and wash the quilt. 5. Loss of motivation and incentive: The patient feels no energy, as if the fountain of life has dried up. Patients do not want to do anything, there is no motivation at all, even if they can barely do something, they feel overwhelmed and very difficult, in fact, they can not do anything well. The patient sometimes wants to get his spirit up, but he can’t get it up. The patient painfully feels that he seems to be broken from the “root”: the patient complains that his memory is bad, he cannot remember anything, he has completely lost the ability to think, he “can’t even think”, his mind is empty. 6, “biological” symptoms or physical symptoms: manifested as sleep disorders, loss of appetite, weight loss, mood changes day and night, loss of sexual desire, constipation, etc.. The main manifestation of sleep disorder is early awakening, i.e. waking up 2~4 hours earlier than usual, and in serious cases, waking up in the middle of the night or not sleeping at all. After waking up, it is not easy to fall asleep, depressed mood, floating thoughts, when the patient’s mood is the lowest, eyes look at the ceiling, do not know when to survive the painful and long day, so many depressed patients is to choose this time in the morning 3-5 o’clock suicide action . Those who have lost their appetite often eat reluctantly in order to survive, has completed the task, eating without flavor, serious cases can appear to refuse to eat, often because of poor eating and only weight loss, thin body shape. Emotional changes day heavy night light, often manifested as early in the morning when waking up with pessimism and disappointment, when to noon after a little activity to be able to simply answer, 3 ~ 4 o’clock in the afternoon slightly thing action, the early lights when the face visible smile, emotions than the day significantly better. But tomorrow the cycle will be repeated, unbearable. 7, anxiety, irritability: patients often feel anxious and restless, difficult to control, such as family members to go to work, study almost to the time of the daily home, the patient began to worry constantly, irritable, seemingly helpless, fidgeting, a moment can not be restful. 8, instrumentation: the patient’s clothing is often casual, facial expressions are quite characteristic: the corners of the mouth hanging down, double eyebrows locked, resembling the “Ω” shape. Often bent over and hanging his head, as if bowing his head to confess guilt. The eyes stare at the ground, rarely blinking, and some are also tearful and want to cry. The shoulders are sagging and leaning forward. 9. Movement and behavior: The patient’s movement and behavior are significantly reduced, making it sluggish or retarded. In mild cases, in physical activities, patients feel weak and reluctant to move, and even some simple activities of daily life feel laborious, and can not do it. In severe cases, the patient can sit still for a long time, resembling a puppet, a wax figure, or a robot. Speech is very slow and low-pitched, and he is often asked several questions before he can answer once. Some of them are like Mrs. Xianglin, telling people around them all day long about their various discomforts, and they are not tired of it. These are the typical symptoms of depression, and patients often have several of these symptoms, but not all of them. In the case of mild depression, it may simply manifest as poor mood, low interest, reduced sleep, physical discomfort, and muscle and joint pain, so it can easily be misdiagnosed as neurasthenia or somatic illness, thus delaying treatment. Some patients’ performance can be atypical, for example, depressed patients are depressed inside, but their facial expression is “forced smile”; some may show excessive sleep, increased appetite, weight gain; some show physical discomfort, muscle and joint pain, internal organ discomfort; some may be accompanied by obsessive-compulsive symptoms, horror symptoms, and even hallucinations and delusions. Delusions.