The touch of her hand on his neck he can dismiss as a tactile hallucination.

Sleep paralysis may be accompanied by visual, auditory or tactile hallucinations.

Regarding central nervous system, it can manifest itself as psychosis, visual and tactile hallucination and anxiety.

An extreme symptom of overdose is amphetamine psychosis, characterized by vivid visual, auditory, and sometimes tactile hallucinations.

Formication is the medical term for a sensation that resembles that of insects crawling (tactile hallucination) on (or under) the skin.

Tactile hallucinations are the illusion of tactile sensory input, simulating various types of pressure to the skin or other organs.

For the diagnosis to be made, auditory and visual hallucinations cannot be prominent, though olfactory or tactile hallucinations related to the content of the delusion may be present.

Tactile hallucinations are still more difficult to recognize; and the hallucinations of smell which are sometimes found as death-warnings rarely have anything special to associate them with the dead person.

Itch is also associated with some symptoms of psychiatric disorders such as tactile hallucinations, delusions of parasitosis or obsessive-compulsive disorders (as in OCD-related neurotic scratching).

But occasionally, patients can go very rapidly into full-blown delirium tremens, with seizures, confusion and visual and tactile hallucinations that make them feel as if spiders are crawling all over the skin.

One subtype of tactile hallucination, formication, is the sensation of insects crawling underneath the skin and is frequently associated with prolonged cocaine or amphetamine use or with withdrawal from alcohol or benzodiazepines.

Shaky hands Sweating Mild anxiety Nausea and/or vomiting Headache Insomnia Between 12 and 24 hours after alcohol cessation, some patients may experience visual, auditory, or tactile hallucinations which usually resolve within 48 hours.

Many habitual abusers develop a transient manic-like condition similar to amphetamine psychosis and schizophrenia, whose symptoms include aggression, severe paranoia, and tactile hallucinations (including the feeling of insects under the skin, or "coke bugs, also known as formication.")

She pulls back her shirt to reveal her upper arms, which are heavily tracked with scars - the result of "dope worms," a tactile hallucination that compels addicts to dig into their flesh to free the creatures they imagine to be burrowing inside.

These may be hallucinations, or illusions related to the environment, e.g., patterns on the wallpaper or in the peripheral vision that the patient falsely perceives as a resemblance to the morphology of an insect, and are also associated with tactile hallucinations such as sensations of something crawling on the subject - a phenomenon known as formication.