OCD is an anxiety disorder, characterised by the presence of recurring intrusive and unwanted thoughts, images, or impulses (obsessions), and repetitive behavioural and mental rituals (compulsions). People with OCD are usually aware that their symptoms are irrational and excessive, but they find the obsessions uncontrollable and the compulsions difficult or impossible to resist.
Obsessions and compulsions are distressing, exhausting, take up a lot of time, and can significantly interfere with the person's family and social relationships, daily routines, education or working life. Common obsessions include: fears of contamination from germs and dirt; fears of harm to self or others; intrusive sexual thoughts or images; and concerns with symmetry, illness or religious issues. Common compulsions include: washing; cleaning; checking; hoarding; touching; counting; and repeating routine activities and actions.
The causes of OCD are not fully understood. Research indicates that OCD may be related to chemical, structural and functional abnormalities in the brain. Genetic and hereditary factors may also play a role in the development of OCD. It is likely that each person’s OCD is the result of several interacting factors and is affected by stressful life events, hormonal changes and personality traits.
About 3 in every 100 people will develop OCD at some time in their lives — that is more than 450,000 Australians.
Treatment can help people manage their obsessions and compulsions, to reduce and sometimes even eliminate the symptoms of OCD. Currently the most effective treatments are medication, cognitive behaviour therapy, and community support and recovery programmes. A combination of treatments, a skilled and experienced clinician, support and education are likely to produce the best outcome.
Last Reviewed: 01 January 2005