Everyone will have times of low mood, there will also be times of high mood, low mood will say they are sick, with the popularity of psychiatric knowledge more and more people have an understanding of psychiatry, the main manifestations of depressive disorders summarize some of the common talk about everyone. 1, first of all, the problem of time, generally at the same time greater than 2 weeks and more than 2 weeks, showing different changes compared to previous function. Shanxi Provincial Mental Health Center Medical Psychology Department Feng Shijie 2, depressed mood as the main symptom, for significant and persistent pessimism, low emotion, all day worry, listlessness, sad face, the ability to experience a variety of emotions is diminished, not interested in many things. 3, slow thinking Consciously slow reaction, active speech is reduced, the voice of speech is low, a word or line has to overcome a lot of resistance, and in severe cases grams present a state of wood stiffness. Agitated depression patients, speech and action are significantly increased, anxiety and fear, agitation and self-injury, the risk is high, should be promptly hospitalized. 4.Impairment of cognitive function Mainly there is a decline in memory, even attention can not focus, learning difficulties, poor language fluency. Impairment of cognitive function 5.Decrease in volitional activity Due to the patient’s depressed mood, there can be reluctance to move, lazy life, do not want to do anything, reluctant to contact with people around and even family members, often sitting alone, silent tears, reluctant to go out, reluctant to go to work, no interest in the activities they used to like to participate in, and in severe cases, there are negative suicidal ideas and behavior. 6, somatic discomfort Many patients show the beginning of somatic discomfort, first go to a general hospital from head to toe examination once, no problem was found, but the patient always feel unwell, at this time should consider whether there are psychiatric problems. The main problems are sleep disorder, fatigue, dull gaze, poor appetite, weight loss, constipation, indefinable body pain, loss of libido, impotence, amenorrhea, etc., of which sleep disorder is the most common. 7.Geriatric depression Depression in elderly patients mainly manifests as anxiety, irritable mood, somatic discomfort, sleep disorders, sometimes some irritability, somatic discomfort is mainly common in the digestive system symptoms. Depression in children is less common and is described in textbooks: clinically, it is mainly characterized by reduced interest, low self-esteem, belief that they are bad children, sometimes self-culpability and a sense of worthlessness; psychomotor depression, reduced speech and movement, unresponsiveness, reluctance to play with children, loneliness, loss of appetite, etc. The diagnosis and treatment of each psychiatric disorder must be made after a face-to-face meeting between the patient and the physician before the appropriate scientific diagnosis can be made. There are even some uncommon disorders that require multiple doctors to meet together to make a diagnosis, and only after a diagnosis is made can targeted treatment be given.