First, what is obsessive-compulsive disorder: the main characteristic of obsessive-compulsive disorder is the subjective irresistible recurrence of ideas, intentions, behavior, want to try to get rid of, but can not do, for this reason feel anxious, nervous, inner turmoil. The prevalence of obsessive-compulsive disorder is about 2%-3%, the age of onset is earlier in men than in women, the prevalence is higher in adolescents, and the prevalence is higher in people who are divorced, separated, unemployed, and have low socioeconomic level. Obsessive-compulsive disorder is easily co-morbid with depressive disorders, anxiety disorders, social terror, drug dependence and other diseases. Second, the clinical manifestations of obsessive-compulsive disorder: the common symptoms of obsessive-compulsive disorder are divided into obsessive-compulsive ideas and obsessive-compulsive actions, patients can appear alone obsessive-compulsive ideas or obsessive-compulsive actions, or the simultaneous existence of two symptoms. Compulsive ideas, compulsive actions specific clinical manifestations are: 1, compulsive ideas: previously had the idea of unpredictable intrusion into the mind at a certain time, these ideas are not simply excessive worry about real life problems, usually meaningless, such ideas persist, causing patients obvious anxiety and pain. Patients subjectively believe that such recurrent thoughts are excessive, yet they are unable to extricate themselves. These thoughts are sometimes time-consuming and significantly interfere with daily life and work. 2, compulsive action: patients are forced to follow a certain idea or mechanical execution of a certain behavior, such as: hand washing, order, check the items, counting, opening and closing doors and other programmed actions, patients do this to reduce the internal pain, in fact, these behaviors do not reduce the internal anxiety or pain. Third, the harm of obsessive-compulsive disorder: obsessive-compulsive disorder should be diagnosed early, early treatment, if taboo to seek medical advice, the disease will cause long-term damage to patients, specifically: 1, cognitive activity is impaired: patients plain concentration difficulties, repeatedly think meaningless things, can not think effectively, rational thinking and logical thinking ability is seriously reduced. 2. Impaired normal emotional experience: Patients are usually immersed in worry and anxiety caused by repeated thoughts or repeated procedural actions, and are unable to experience normal positive emotions such as happiness, pleasure and accomplishment. 3.Impaired social function: Patients’ normal interpersonal relationships are affected, they cannot make friends effectively, and in serious cases, they will have social function disability. 4, normal personality development is hindered: the normal personality development of adolescent patients is hindered, it is difficult to form good social adaptability, the maturity level of personality significantly lagged. Fourth, the treatment of obsessive-compulsive disorder: 1, the goal of treatment: to reduce obsessive-compulsive symptoms, as early as possible to achieve clinical recovery, improve the patient’s compliance, improve their social function, quality of life, so that they return to society as soon as possible. 2.Treatment method: Adopt the principle of comprehensive treatment, generally using assessment-based medication combined with psychotherapy, physical therapy, family support therapy, for each patient to develop an individualized treatment plan. 3.Treatment course: Patients need the whole course of treatment (initiation period, symptom control period, consolidation treatment period, maintenance treatment period, drug reduction period). Generally, the treatment starts to take effect in 2-3 weeks, followed by 2-3 months of increasing the drug dose to gradually control the obsessive-compulsive symptoms, and then the drug dose is basically stable for consolidation treatment for 6 months. If the patient’s condition is stable, the drug dose is reduced slightly to maintain treatment for 6-12 months. Then, the dosage is gradually reduced over 6 months until the patient stops taking the medication. The above is the general treatment rule, the physician will arrange for the patient to visit the hospital regularly to adjust the medication according to the changes in the condition. Five, need to remind matters: patients with obsessive-compulsive disorder generally start slowly, if not treated, about half of the patients will gradually develop obsessive-compulsive symptoms, a small number of patients will have a short period of remission. It should be noted that patients with obsessive-compulsive disorder suffer subjectively and have significant impairment of cognitive and social functions. They should go to the mental health department of a regular general hospital or a specialized hospital for standardized treatment to stop the development of the disease as early as possible, improve cognitive functions and enhance the quality of life. Patients should live, study, work, and make friends as normally as possible during treatment, and family members should understand the patient and give adequate family support to enable the patient to heal and return to society as soon as possible.