What is the definition or description of: tactile hallucination?

Imaginary bugs: When a person feels sensations on their skin that don't have physical or neurological basis. The most common type of tactile hallucinations are the sensation of bugs crawling on the the skin.

Tactile Hallucinatio: Is false tactile perception in the absence of a stimulus. It is the illusion of a tactile sensory input, such as sensation of insects crawling on the skin seen in cocaine/amphetamine dependence or in alcohol/benzodiazepine withdrawal, or in delirium states.

Touch: Tactile hallucinations by definition, are when a patient believes something is touching their skin on any part of their body, when in reality there's nothing there.