There are various symptom expressions. The main mental symptoms can be divided into the following types: 1, depression type (serious cases may appear suicidal behavior), mainly depressed mood, sadness, easy to cry, pessimism and despair, or anxiety type, mainly anxiety, worry, fear, sensitivity and suspicion, nervous trembling, willing to confide in others, etc.; 2, truancy, miners, fighting, roughness, destruction of public property, lawlessness and anti-social behavior, etc.; to The behavioral retreat type, which mainly includes loneliness, dissociation, non-participation in social activities, lack of hygiene, and irregular life; the work-learning ability reduction type, which mainly affects study or work and decreases efficiency (poor performance). 3. However, many patients present with a combination of symptoms. For example, if a teenager is separated from his or her loved ones, he or she is depressed, irritable, overwhelmed and violent, and is typed according to his or her prominent symptoms. Patients are also often associated with physical dysfunction such as poor sleep and appetite. 4. The onset of symptoms is usually within 1 month after a stressful event or life change, and the duration of symptoms usually does not exceed 6 months, except for long-term depressive reactions.