Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Obsessive-Compulsive Disorder ?
    ### Response:
    Obsessive-compulsive disorder (OCD) is a type of anxiety disorder. If you have OCD, you have frequent, upsetting thoughts called obsessions. To try to control the thoughts, you feel an overwhelming urge to repeat certain rituals or behaviors. These are called compulsions.
    