The application relates to an apparatus, method and computer program for identifying an obsessive compulsive disorder (OCD) event. The event may be identified by monitoring signals obtained from a plurality of biometric sensors wherein the biometric sensors are configured to measure one or more biometric parameters of a subject. When an OCD event is identified one or more outputs maybe provided in response to the identification of the event. The outputs comprise providing instructions to the subject to perform one or more actions to mitigate the OCD event. Further signals are obtained from the plurality of biometric sensors after the one or more instructions have been provided and these signals are used to monitor a response of the subject to the one or more instructions.
