What term describes an exceptional interest in and admiration for oneself?

The term that describes an exceptional interest in and admiration for oneself is "Narcissism." This word originates from the myth of Narcissus, a character in Greek mythology who fell in love with his own reflection in a pool of water, ultimately leading to his downfall. In psychology, narcissism is often associated with a personality trait characterized by grandiosity, a need for admiration, and a lack of empathy for others. It reflects an inflated sense of self-importance and an obsession with one's own achievements and appearance.

The other terms listed do not pertain to self-admiration. "Neuralgia" refers to intense pain along the path of a nerve, commonly associated with nerve damage or irritation. "Nauseant" describes something that causes nausea or a feeling of sickness, while "Nidus" refers to a nest or a site of origin, particularly in biological or medical contexts. Therefore, "Narcissism" is the only option that accurately captures the concept of excessive self-interest and admiration.