Delusional Disorder

With a delusional disorder, delusions involving persecution are not uncommon—for example, the belief that a monitoring device has been implanted in one’s body. Delusional disorder symptoms can also encompass erotomania, in which a person believes a celebrity or complete stranger is in love with them. Attempting rational communication with someone who suffers from a delusional disorder can be ineffective and frustrating.

Distinct from schizophrenia, delusional disorders are a separate psychosis. Routine functioning generally is not impaired, and behavior is not affected except for the delusional disorder symptoms. Delusional disorder treatment includes psychotherapy and prescription medications. The goal of a medical professional is to establish a therapeutic alliance with a person with a delusional disorder.

Sources: Psych Central