This research looks at a variety of aspects related to obsessive-compulsive disorder (OCD), such as symptoms, possible factors diagnosis, and treatment methods. OCD's distinctive ritualistic compulsions, which frequently manifest as uncontrollable thought and behavior patterns, are brought on by distressing obsessions. According to this study neurotransmitter and Corticostriatal circuits abnormalities have been linked to this disorder, although the exact cause is still unknown. Increased susceptibility among blood relations of sick individuals suggests a role for genetics. Obsessions and compulsions are diagnosed based on predetermined criteria that highlight their irrationality and disruptive nature. The connection between obsessive thoughts and anxiety can be broken by a number of treatments, the foundation of which is behavioral therapy. By gradually confronting anxiety-inducing circumstances, exposure and response prevention (ERP) has proven successful. According to this paper the main objectives of cognitive therapy are to address dysfunctional thought processes, such as overestimating threats or taking on excessive responsibility. This paper contends that by cognitive-behavioral therapy (CBT) combining behavioral and cognitive elements is both economical and efficient. The studies under review in this paper demonstrate differences in treatment effectiveness, accentuating the necessity for more studies with larger sample sizes in making definitive judgments on treatment outcomes.