OCD refers to a neurological disorder characterized by obsessive-compulsive symptoms. It is characterized by the coexistence of conscious self-compulsions and counter-compulsions, which cause anxiety and distress to the patient. The patient is also aware of the abnormality of the symptoms, but cannot get rid of them. The patient with prolonged illness can have mainly ritualistic movements with reduced mental suffering, but social function is severely impaired. Symptom Criteria] (1) Meet the diagnostic criteria of neurosis and have at least one of the following compulsive symptoms: (1) Compulsive thoughts, including compulsive ideas, memories or representations, compulsive oppositional ideas, exhaustive thinking, fear of losing self-control, etc.; (2) Compulsive behaviors (actions), including repeated washing, checking, examining, or questioning, etc.; (3) Mixed forms of the above; (2) The patient claims that the compulsive (2) The symptoms originate from within oneself and are not imposed by others or external influences; (3) The compulsive symptoms recur repeatedly and the patient finds them meaningless and feels unpleasant or even painful, so he or she tries to resist, but it does not work. [Severity criteria] Impaired social function. Criteria for course of illness】Meets the criteria for symptoms for at least 3 months. Exclusion criteria】 (1) Exclude secondary obsessive-compulsive symptoms of other psychiatric disorders, such as schizophrenia, depression, or phobias; (2) Exclude secondary obsessive-compulsive symptoms of organic brain diseases, especially basal ganglia lesions.