Melvin Udall is a successful writer living in New York City. At the beginning of the film he is an irritable, obsessive-compulsive man who alienates himself from those around him. Adding to his alienation, he works from home and doesn't allow anyone into his apartment. His routine consists of going to the same restaurant, being served by the same waitress and eating at the same table every day. His mental disorder also manifests itself in several obsessive-compulsive actions such as turning the locks five times and doing the same with the lights in his house. One day, Melvin's homosexual neighbor is attacked and hospitalized. Due to bad luck, Melvin is forced to look after his neighbor's dog while he recovers from the attack. At this point in the film, Melvin develops an emotional attachment to the dog and his attitude begins to change for the better. Melvin decides to help the restaurant waitress by paying for his son's medical bills. This gesture comes after he had a mental breakdown when she didn't show up to work to serve him. Towards the end of the film, Melvin goes on a trip to help his neighbor and invites the maid to accompany him. The trip doesn't go as planned, but the experience helps him learn to communicate and have better relationships with people. Eventually, Melvin falls in love with the waitress and is willing to learn to overcome his obsessive-compulsive lifestyle to be with her. It is very likely that Melvin will be diagnosed with obsessive-compulsive disorder, as he meets all of the DSM-5 criteria for obsessive-compulsive disorder. Shows obsessions, which are defined by recurrent, intrusive, persistent and uncontrollable thoughts, impulses or images (Kring, Johnson, Davison and... at the center of the article... digm, cognitive behavioral therapy would be the best solution) option of most effective treatment for Melvin During exposure and response prevention, individuals suffering from obsessive-compulsive disorder are directly exposed to anxiety-provoking behaviors and thoughts. During therapy, individuals learn to deal with their anxiety and resist urges to perform compulsions caused by obsessions. Individuals in treatment learn to replace negative thoughts with positive ones. Melvin's treatment should begin with exposure to each of his obsessions and gradually move from low-anxiety to high-anxiety triggers. Melvin's anxiety stemming from his obsessions should decrease significantly with social support from his newly developed relationships. Finally, research shows that 75% of people with obsessive-compulsive disorder are helped dramatically by cognitive behavioral therapy (Nichols)., 2010)