When I say creepy, I mean creepy. As in formication, etymologically derived from the Latin word formica, meaning “ant”, precisely because of this similarity in sensation to that of crawling insects. The term has been in use for several hundred years. In the 1797 edition of the Encyclopædia Britannica, a description of the condition raphania includes the symptom:
…a formication, or sensation as of ants or other small insects creeping on the parts.
This wonderful peri-menopausal experience happened to me a couple of months after I met my now DH, dear husband. Can you imagine, sitting on the couch, necking as we called it in my youth, and all of a sudden you have the sensation of an army of ants crawling all over your skin. Scratch my back, I pleaded and threw myself upon my stomach across his lap. This happened repeatedly for several months. The funny thing is when I reported the symptom to my gynecologist he had never heard of it. Yo, Doc, get with the program !