Although the cause of OCD has not yet been elucidated, it is not difficult to find that its development is not only related to the psychological factors of the person’s personality, but also to the imbalance of neurotransmitter secretion in the brain, according to the existing research. The reason for this is that both psychotherapy and medication play a pivotal role in relieving the patient’s condition. 1, psychotherapy OCD as a psychological disease, the mechanism of its occurrence is very complex, and the psychological mechanism of patients with similar symptoms may be very different. In psychotherapy, the therapist establishes a good doctor-patient relationship with the patient, listens to the patient, helps him/her discover and analyze the inner conflict, promotes the patient to solve the problem, increases his/her ability to adapt to the environment, and rebuilds a sound personality. Commonly used clinical approaches include: psychodynamic therapy, cognitive-behavioral therapy, supportive psychotherapy and Morita therapy. Among them, cognitive behavioral therapy is considered to be the most effective psychotherapy for OCD, mainly including thought blocking and exposure response prevention. Thought blocking is used to block compulsive thoughts by diverting attention or exerting external control, such as setting an alarm clock bell, when the patient has recurrent compulsive thoughts, and to relieve anxiety when necessary with relaxation training. For example, if the patient is afraid of getting dirty and must wash his hands repeatedly to make sure he does not get sick, he needs to gradually touch his sweat, the soles of his shoes, the door handles of public toilets, and toilet seats without washing his hands in several sessions during the exposure prevention. The anxiety that accompanies obsessive-compulsive symptoms will be relieved after several treatments until it subsides, thus achieving the role of controlling obsessive-compulsive symptoms. 2, medication The onset of OCD is related to the imbalance of a variety of neurotransmitters in the brain, mainly manifested by the disruption of the 5-hydroxytryptamine system function. Currently used anti-OCD drugs are antidepressants, which are characterized by the ability to regulate the function of neurotransmitters such as 5-hydroxytryptamine in the brain, so as to improve the role of obsessive-compulsive symptoms. The more used are mainly selective 5-hydroxytryptamine reuptake inhibitors. These include fluvoxamine, paroxetine, sertraline, fluoxetine, citalopram, etc., and tricyclic antidepressants clomipramine, and if necessary, clinical use of insulin and benzodiazepines to help relieve anxiety and improve insomnia. For refractory OCD, risperidone, quetiapine, olanzapine, aripiprazole, etc. are often used in combination to improve the efficacy. As with psychotherapy, the efficacy of medication is not immediate. Generally, SSRIs require 10 to 12 weeks to achieve full anti-compulsive effect, and if the treatment is effective, the medication still needs to be maintained for 1 to 2 years to consolidate the effect. Physiotherapy For patients with refractory OCD, modified electroconvulsive shock and transcranial magnetic stimulation can be used selectively according to the specific situation. Neurosurgery is considered to be the last option for OCD, but because of the adverse effects of spasticity and sensory loss, the indications for surgery must be strictly controlled and the patient should be considered for surgery after consultation with three chief psychiatrists.