As the public’s understanding of depression deepens, more and more people are beginning to pay attention to this disease, but those who can really master this disease are still physicians of psychosomatic medicine/psychology/mental health, so when you have doubts, you can consider seeking help from professionals, and now that the Internet is this developed, you can choose physicians with good reputation. Today here to teach you the simple method of self-identification: 1. Symptoms The core symptoms of depression are – unhappiness, low mood, decreased interest, summed up in one word – low, summed up in one word – -sadness. In addition accompanied by fatigue and lack of energy. All of the above is called low mood. This is the fundamental manifestation, the main and continuous symptom. 2.Severity criteria Social function is impaired, causing pain or adverse consequences to the person. 3.Course of illness criteria ①Meet the symptom criteria and severity criteria has lasted at least 2 weeks. ②Some schizophrenic symptoms may exist, but do not meet the diagnosis of schizophrenia. If the symptom criteria of schizophrenia are also met, the depressive episode criteria are met for at least 2 weeks after the schizophrenic symptoms have resolved. 4. Exclusion criteria Exclude organic mental disorders, or depression due to psychoactive substances and non-addictive substances.