formication

Circa 1700, from Latin formīca (ant) + -tion.

formication (countable and uncountable, plural formications)

1. (medicine) 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.

• formic
• formic acid
• formicate

• formication on Wikipedia.Wikipedia