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Obsessive Compulsive Disorder is commonly diagnosed with the combination of obsessions and compulsions, but it is possible to have OCD with only one. Obsessions, as stated earlier, are constant urges that cause stress or anxiety. Symptoms of obsessions include irrational fears, having things be specifically organized, aggressive thoughts, and unwanted thoughts. Compulsions, as stated earlier, are ritualistic behaviors that the person feels forced to do. Symptoms of compulsions include cleaning, counting, orderliness, and routine. People with OCD typically have a difficult time throwing things away. Many people with OCD develop nervous tics such as tapping or twitching in order to reduce anxiety. So, in the early stages of OCD people may tend to display mild compulsive behaviors. Some people may tend to be preoccupied with details; simple things that people may overlook could easily be picked up and scrutinized by someone with OCD. People with OCD may display a certain level of perfectionism that does not allow a task to be completed. Some may be excessively devoted to working and being productive. In correlation with breaking religious morals being a common fear for people with OCD many will display very rigid religious standards. People with OCD may be very reluctant to work with a group or team. Many people may become rather stubborn and they feel the need for things to go exactly as they think they should. The causes of OCD are not yet completely understood, some theories include genetics and some include environmental factors. " Because personality disorders describe long-standing and enduring patterns of behavior, they are most often diagnosed in adulthood" (Psych Central 2014). OCD is almost never diagnosed in adolescents because they are in a constant state of development. OCD can be difficult to diagnose in general because it shares many of its symptoms with other disorders such as depression.