Delusional parasitosis

Delusional parasitosis, or delusory parasitosis, also known as Ekbom's syndrome, is a form of psychosis. Victims acquire a strong delusional belief that they are infested with parasites, whereas in reality no such parasites are present. Often, a sensation known as formication manifests, and when combined with underlying psychiatric or psychopharmacological issues, can lead to delusional parasitosis.