Obsessive-compulsive disorder (OCD) is a type of neurological disorder characterized by the recurrence of obsessive-compulsive ideas and compulsive actions. OCD accounts for 0.1% to 0.46% of psychiatric patients and about 0.05% of the general population. The disease mostly develops before the age of 30, more men than women, and is common in brain workers. The patient’s personality characteristics: subjective, capricious, stereotypical, competitive, excessive pursuit of perfection, repeated thinking, indecisive, cautious, excessive restraint on their own, etc., with these adverse personality characteristics are prone to OCD. The basic symptoms of OCD are obsessive-compulsive ideas and compulsive actions, which the patient fully recognizes as unnecessary but cannot control with subjective will. Second, obsessive-compulsive ideas: compulsive suspicion. Patients are always reassured about what has been done, and have to repeatedly check. For example, whether the doors and windows are closed, whether the gas is turned off, etc.; compulsive memories. Patients repeatedly recall past experiences and events, such as recalling whether the words and tone of the words they have spoken are appropriate, etc.; compulsive association. When the patient hears, sees or thinks of something, he involuntarily associates it with some unpleasant or ominous scenarios, such as thinking of a fire when he sees someone smoking. There are also compulsive intentions and compulsive emotions. For example, worry that they will hurt others, worry that they will say the wrong thing, worry that they are contaminated by toxic substances or bacteria, etc. Compulsive action: That is, the repetition of some actions, know that they are unnecessary but can not get rid of. Forced washing. Commonly there are forced hand washing, laundry, etc. Forced inspection. Such as repeatedly checking whether the doors and windows are closed when leaving the house, repeatedly checking whether the wrong word is written when sending letters, etc. Compulsive counting. When patients see electric poles, steps, cars, license plates, etc., they cannot restrain from counting, and if they do not count, they feel anxious. Fourth, the impact of OCD on life: OCD is more harmful because of involuntary recurring thoughts entangled, or have stereotypical, meaningless repetitive behavior, inability to focus, anxiety, seriously affect the person’s learning and work, serious can completely lose the ability to learn and work, resulting in mental disability. Patients want to get rid of it, but they all end up in failure and are unable to get rid of it by themselves, causing great inner pain. V. Treatment: medication plus psychotherapy. Psychotherapy: For patients to calmly analyze their personality characteristics and the causes of the onset of the disease, including the presence of childhood trauma that produced OCD, find out the psychological factors, and carry out systematic psychotherapy and drug treatment. Take the attitude of going with nature and doing what is right. Do not fight against compulsive thinking, but do what you should do with “uneasiness”. In addition, biofeedback therapy, behavioral therapy, aversion therapy, exposure therapy, etc., all have certain effects.