Delusional parasitosis is a form of psychosis in which sufferers hold a delusional belief they are infested with parasites.
什么是'妄想的寄生虫-妄想有皮肤疾病，由于寄生虫感染'?
英语百科
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.