Phobia (phobia) is a neurological disorder characterized by an excessive and irrational fear of an external object or situation. The patient is unable to prevent a fear attack even though he or she knows it is unnecessary, and the fear attack is often accompanied by significant anxiety and autonomic symptoms. Patients try to avoid the feared object or situation, or endure it with fear. He Ming, Psychiatry Department, Mental Health Center, Zhejiang University School of Medicine Diagnostic criteria: 1. Meet the diagnostic criteria for neurosis; 2. unnecessary, but uncontrollable; (5) avoidance of fearful situations and things must be or have been a prominent symptom; (5) exclude anxiety, schizophrenia, and hypochondria. Place phobia Diagnostic criteria: 1. Meet the diagnostic criteria for phobias; 2. Fear of certain specific environments, such as squares, closed rooms, dark places, crowded places, transportation (such as crowded ships, train cars), etc. One of the key clinical features is excessive fear of being in the above situations without an immediate exit; 3. Exclude other fear disorders. Social phobia (social anxiety phobia) Diagnostic criteria: 1, meet the diagnostic criteria of phobia; 2, fear of objects mainly for social situations (such as eating or talking in public, parties, meetings, or fear of making some embarrassing behavior, etc.) and interpersonal contact (such as contact with people in public, fear of eye contact with others, or fear of being scrutinized in relation to the crowd, etc.); 3, often accompanied by self-evaluation Low self-esteem and fear of criticism; 4. Exclude other fear disorders. Diagnostic criteria: 1, meet the diagnostic criteria of phobia; 2, the object of fear is a specific object or situation not included in the fear of place and social fear, such as animals (such as insects, rats, snakes, etc.), high places, darkness, lightning, blood, trauma, injection, surgery, or sharp sharp objects; 3, exclude other fear disorders.