The cause of<unk>  is unknown. It may be related to excess dopamine in the brain's striatum, resulting from diminished dopamine transporter (DAT) function, which regulates dopamine reuptake in the brain. Evidence supporting the dopamine theory is that medications that inhibit dopamine reuptake (for example cocaine and amphetamines) are known to induce symptoms such as formication. Other conditions that also demonstrate reduced DAT functioning are known to cause secondary<unk> ; these conditions include "schizophrenia, depression, traumatic brain injury, alcoholism, Parkinson's and Huntington's diseases, human immunodeficiency virus infection, and iron deficiency". Further evidence is that antipsychotics improve<unk>  symptoms, which may be because they affect dopamine transmission.
Delusional parasitosis
Helminthiasis
Acariasis
Soil-transmitted helminthiasis
Schistosomiasis
Toxocariasis
Cyclosporiasis
Isosporiasis