Many modern people are plagued by psychological problems, but most ordinary people face psychiatric problems but seems to be “foggy”, it is difficult to grasp what kind of psychological is normal, what situation is abnormal. In fact, psychiatric symptoms are not subtle, we may want to understand the following common symptoms, so as to “follow the vine to find the melon”, early detection of disease. A. Personality change. “Suddenly like a different person”, this is the description of many family members of patients with mental illness. If a person in a certain period of time, a big change in temperament, suspicious, arbitrary reasoning and judgment, think that people around them are with their own fault, walking on the road feel tracked, think that others are talking about themselves; or self-serving, think that the opposite sex like themselves, etc., to be highly suspicious of whether there are delusions of victimization and other thinking disorders. Second, emotional abnormalities. Emotional abnormalities are very common psychosomatic symptoms. Some people are sullen all day long, do not like to talk to people, can not be interested in the original favorite things, feel no point in living, etc.; others are in high spirits, feel good about themselves, feel that they can do anything. Some patients may also laugh for no reason, but the expression is indifferent, or for no reason nervous, scared, etc. Third, the will is diminished. When suffering from depression or schizophrenia, the person’s “zest for life” may be suddenly interrupted. The original positive and enthusiastic elite in the workplace may become sloppy at work, negligent, late and early; the original good and motivated children may have their grades fallen, distracted in class, homework in a mess, or even lazy, unkempt, lying in bed all day and not wanting to move. Fourth, neurasthenia or somatic sensory abnormalities. Some psychological problems first affect the body, appearing headache, insomnia, dreamy and easy to wake up, menstrual disorders, tiredness and weakness similar to neurasthenia; or repeated physical discomfort but can not find the cause, such as abdominal pain, dizziness, chest pain, panic, chest tightness, loss of appetite, and even limb weakness. V. Abnormal behavior and movement. Symptoms such as delusions and hallucinations may cause patients to show some puzzling abnormal behaviors. For example, screaming and cursing into the air, mumbling, making inexplicable movements; or numb and slow, stiff and mechanical movements, standing or sitting for no reason, or prolonged daze, etc.