City & CountyStatistics. Sullivan County is a county located in the U.S. state of Indiana, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1940. As of 2010, the population was 21,475. The county seat is Sullivan. Sullivan County is included in the Terre Haute, Indiana, Metropolitan Statistical Area.
1 Obsessive compulsive disorder (OCD) is an anxiety disorder characterized by irresistible thoughts or images (obsessions) and/or rigid rituals/behaviors that may be driven by obsessions (compulsions).
Obsessive-compulsive disorder is an anxiety disorder characterized by unwanted thoughts and repetitive, ritualized behaviors you feel compelled to perform. If you have OCD, you probably recognize that your obsessions and compulsions are irrationalâbut even so, you feel unable to resist them and break free.