Mokyoktang+Mary

Marie is very concerned with cleanliness and hygiene. She spends a significant amount of time each day washing her hands or showering, especially after touching a toilet seat, door knob, or any other item she thinks may be dirty or contaminated. The patient explains that she is concerned about becoming infected or sick from touching these objects. She periodically acknowledges that the washing is excessive but explains that she becomes very anxious when she tries to avoid washing and eventually feels compelled to wash even more to make up for the omission.


 * 1) Should we wash our hands after touching contaminated things or using the bathroom? Is Marie's concern understandable?
 * 2) Diagnosis?
 * 3) Treatment?