“Obsessive-Compulsive Disorder, OCD, is an anxiety disorder and is characterized by recurrent, unwanted thoughts (obsessions) and/or repetitive behaviors (compulsions). Repetitive behaviors such as handwashing, counting, checking, or cleaning are often performed with the hope of preventing obsessive thoughts or making them go away. Performing these so-called “rituals,” however, provides only temporary relief, and not performing them markedly increases anxiety.”
-National Institution of Mental Health
OCD is a mental disorder because it develops a strict routine into an individual’s mind. If that routine is not exact, the individual experiences anxiety. This mental disorder is an internal conflict because the people who have it push the routine to perfection and, if not perfected, they can become angry with themselves for not pursuing the routine as planned.