Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of Formication
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Formication: The illusion or hallucination that ants or other insects are creeping on or under the skin. Formication is a feature of some psychotic states as well as drug and alcohol abuse. From the Latin formicatio, from formicare meaning to creep like an ant. Not to be confused with fornication.
Need Expert Advice on Your Condition?
Get a personalized video breakdown and treatment plan from our senior neurosurgeons using your MRI/CT scans.
👉 Request MRI Review