Obsessive-compulsive disorder, also known as obsessive-compulsive neurosis and obsessive-compulsive disorder. It is a neurological disorder characterized by recurrent obsessive thoughts and/or compulsive behaviors. Compulsive thinking: is the involuntary recurrence of thoughts, representations (images) and wishes (impulses) in the brain that are unpleasant to us, such as: always feeling that our hands or clothes are contaminated with viruses or bacteria, doors and windows are left open, faucets and lights are not turned off, etc., making mistakes in questions or work reports; images about violence or terror, or a constant urge to harm ourselves or others. Compulsive behaviors: These include repeated washing, checking, counting, and certain ritualistic actions. Compulsive behaviors are usually driven by obsessive thoughts and are used to relieve internal tension and fear. There is a “counter-compulsive” will. People with OCD suffer greatly because they have no control over the compulsive thoughts that enter their minds, and often have a certain amount of “counter-compulsions” in which they try to ignore or repress the compulsive thoughts, avoid seeing certain stimuli or places, or counteract them with other thoughts and behaviors (e.g., performing a compulsive behavior). OCD symptoms often last for months and years and can have a significant impact on an individual’s work, life, school, and relationships.