Obsessive-Compulsive Disorder (OCD):A disorder where people have recurring thoughts (obsessions) that lead them into performing specific behaviors (compulsions) over and over again.
Body Dysmorphic Disorder (BDD): A psychological disorder in which a person becomes obsessed with imaginary defects in their appearance.
Hoarding Disorder: A persistent difficulty discarding or parting with possessions because of a perceived need to save them.