Formication is the feeling of something crawling under the skin .
Many habitual abusers develop a transient , manic-like condition similar to amphetamine psychosis and schizophrenia , whose symptoms include aggression , severe paranoia , restlessness , confusion and tactile hallucinations ; which can include the feeling of insects under the skin ( formication ) , also known as `` coke bugs '' , during binges .
Cocaine dependence