Tactile hallucinations are noticed in
Parkinsonism
Chronic depression
Chronic cocaine poisoning
Acute barbiturate poisoning
Magnan's Syndrome / Cocaine Bugs This is seen in cocaine addicts. It is a type of tactile hallucination. There is a feeling as if grains of sand are lying under the skin or small insects are creeping on the skin giving rise to itching sensation (formication).
Toxicology - 2