Delusional parasitosis

Medical condition

Delusional parasitosis (DP) or delusional infestation is a mental disorder in which individuals have a persistent delusion that they are infested with living or nonliving agents, such as parasites, insects, or bacteria, when no such infestation is present. Individuals may present with dermatologic symptoms, such as excoriation or formication associated with tactile hallucinations, or, in the case of Morgellons disease, a subtype of delusional parasitosis, with wounds from which they believe harmful fibers or parasites are emerging.

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