，1 Forewords

    The obsessive compulsive disorder is common mental health problem.In US study，the 12 month prevalence is 1.2%，and life time prevalence is 2.3%.A recent epidemiological survey in Beijing suggests 12 month prevalence 0.90% and life time prevalence 2.50%[1].The obsessive compulsive disorder is one of anxiety disorders which the most common mental problem in population.General practitioners need to have knowledge of the disorder and also cooperate with mental health specialists for patient management.

    2 Background

    Kim Kong is a 30 year old nurse who works in the surgical ward of a major hospital.She is married to a surgeon from the same hospital and has two children aged 1 and 4 years. ......