Obsessive–compulsive disorder (
OCD) is a
mental disorder where people feel the need to check things repeatedly, perform
certain routines repeatedly, or have
certain thoughts repeatedly. People are unable to control either the thoughts or the activities. Common activities include
hand washing, counting of things, and checking to see if a door is locked. Some may have difficulty throwing things out. These activities occur to such a degree that the person's daily life is negatively affected. Often they take up more than an hour a day. Most adults realize that the behaviors do not make sense. The condition is associated with
tics,
anxiety disorder, and an increased risk of
suicide.