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.

Genetic Material
Chromosome_DNA
The genes that you inherit from your family may play a role in the development of OCD.
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