tactile hallucination
Medical term for a hallucination involving the sense of touch, such as feeling something crawling on the skin when nothing is there.
Tactile hallucinations can appear as one of the symptoms of schizophrenia.
Compound of 幻 (gen, 'phantom, illusion') and 触 (shoku, 'touch, contact'). The exact historical derivation is uncertain, but the word follows the pattern of other medical terms for specific hallucinations.