Its an anxiety disorder that involves obsessions and compulsions and both. Intrusive and unwelcome thoughts can result in a person carrying out repetitive behaviours and rituals which are called compulsions
Effects around 750,000 people in uk = 1.2-1.5%
Women affected later in life compared to men who are effected early in life
Obsessions are recurrent and persistent thoughts, urges or images that are experienced as intrusive and unwanted
Compulsion are repetitive behaviours or mental acts that an individual feels driven to perform in response to an obsession or according to the rules must be applied rigidly
Preoccupations and by repetitive behaviours or mental acts in response to the preoccupations
Other ones are related to disorders characterised primarily by recent body focused repetitive behaviours and repeated attempts to decrease or stop the behaviours
