Formication

Forˊmi-ca′tion

,

Noun.

[L.

formicatio

, fr.

formicare

to creep like an ant, to feel as if ants were crawling on one’s self, fr.

formica

ant: cf. F.

formication

.]

(Med.)

A sensation resembling that made by the creeping of ants on the skin.

Dunglison.

,

Noun.

[L. formicatio, from formico, or formica, an ant.]

A sensation of the body resembling that made by the creeping of ants on the skin.

formication ‎(plural formications)

An abnormal skin sensation similar to that of insects crawling over or within the skin; a tactile hallucination involving such a sensation. A common side-effect of substance abuse, it can also be experienced with high fever, menopause, skin cancer, diabetic neuropathy, or herpes zoster.
- 1853, The Scottish Review
  Soon the formications and muscular debility returned, not alone, but accompanied with painful cramps and startlings in the feet and calves of the legs.