In delusional disorder, the delusions can vary in content; they can be paranoid, hypochondriacal (i.e., health-focused), grandiose, or jealous in character, among many other possibilities.

This type of jealousy often occurs in the presence of mental health conditions, including delusional disorders, schizophrenia, borderline or narcissistic personality disorders, bipolar disorder ...

Season 4 of the hit TV show 'You' spotlights Joe Goldberg's erotomania again. A psychiatrist explains what it is, common symptoms, and how it's treated.