Obsessive-compulsive disorder (OCD) is an anxiety disorder . The
person suffers from unwanted repetitive thoughts and behaviors.
These obsessive thoughts and compulsive behaviors are very
difficult to overcome. If severe and untreated, OCD can harm the
ability to function at work, school, or home. The cause is
unknown. OCD may be due to neurobiological, environmental,
genetic, and psychological factors. An imbalance of serotonin (a
brain chemical) may play a major role. Factors that may increase
the risk of OCD include: Obsessions—unwanted, repetitive, and
intrusive ideas, impulses, or images; common obsessions include:
- Persistent fears that harm may come to self or a loved one -
Unreasonable concern with being contaminated - Unacceptable
religious, violent, or sexual thoughts - Excessive need to do
things correctly or perfectly - Persistent worries about a
tragic event Compulsions—repetitive behaviors or mental acts to
reduce the distress associated with obsessions; common
compulsions include: - Excessive