Recently a teenager came into my office complaining about the anxiety they were experiencing from their Obsessive Compulsive Disorder (OCD) parent. They gave me a few examples. The compulsive handwashing that led to dry and sometimes bloody hands was imposed on everyone in the household. There was a sense of superiority that this family did things such as proper cleaning and sterilized laundry better than others. The excessive rituals before and after people would leave the house were designed to impress a magazine decorating editor. Unable to keep up with the expectations of the parent, the teenager felt defeated. But after meeting the parent, it became apparent that in addition to the OCD they had Narcissistic Personality Disorder (NPD). This changes everything: the approach, the treatment planning, and the management of the OCD because the underlying motive is completely different. A person who has NPD and OCD is not likely to change their behavior but it can be guided so as not to

Source: How Narcissism Changes Obsessive Compulsive Disorder