Can’t control repeatedly thinking about a thing is more common in clinical OCD, OCD is a kind of mental psychological disorder based on obsessive thoughts or compulsive behavior, that is to say, the recurring, persistent, inappropriate thoughts in the minds of patients with OCD, such thoughts are their repeated thinking, sometimes feel unnecessary, unreasonable, but, can not get rid of, painful, therefore, will be through some compulsive Behavior to relieve the pain, anxiety caused by compulsive thoughts, more common some can not control repeated thinking, such as the fear of dirty, fear of bacteria on their own body to family members and loved ones, bringing physical health effects, etc. Therefore, repeatedly can not control thinking about a thing, clinically more considered to be obsessive-compulsive disorder. In the clinical treatment of OCD, the combination of medication and psychotherapy is generally the most effective, with medications such as sertraline, fluvoxamine, paroxetine and other antidepressants as the mainstay; psychotherapy with cognitive behavioral therapy as the preferred treatment method.