Formication

Abnormal sensation that bugs are crawling on or under the skin

Formication is the sensation resembling that of small insects crawling on the skin, in the absence of actual insects. It is one specific form of a set of sensations known as paresthesias, which also include the more common prickling, tingling sensation known as pins and needles. Formication is a well-documented symptom which has numerous possible causes. The word is derived from formica, the Latin word for ant.

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