What specifically is the old term monomania of pride?

Monomania of pride refers to an obsessive preoccupation with one's own importance, achievements, or self-image, often to the detriment of one's relationships and overall well-being. This term, rooted in the 19th-century understanding of mental disorders, suggests an excessive focus on a singular aspect of the self, leading to distorted perceptions and behaviors. Individuals exhibiting this condition may become intolerant of criticism and excessively self-congratulatory, hindering personal growth and social connections.