Webformication is the sensation resembling that of small insects crawling on (or under) the skin, in the absence of actual insects. Webformication is a symptom where you hallucinate the feeling of insects crawling in, on or underneath your skin. This symptom has many possible causes, including mental health.

It is one specific form of a set of sensations known as. Webformication, a type of tactile hallucination, is the feeling of imaginary insects or spiders on the skin.