Obsessive-compulsive or related transtorno induced by unknown or não especificado psychoactive substance is characterised by either repetitive intrusive thoughts or preoccupations, normally associated com anxiety and typically accompanied by repetitive behaviours performed in response, or by recurrent and habitual actions directed at the integument (e.g., hair pulling, skin picking) that develop during or soon after intoxicação com or abstinência from an unknown or não especificado psychoactive substance. The symptoms are not better explained by a primary mental transtorno (in particular an Obsessive-compulsive or related transtorno), as might be the case if the symptoms preceded the onset of the unknown or não especificado psychoactive substance uso, if the symptoms persist for a substantial period of time after cessation of uso or abstinência of the unknown or não especificado psychoactive substance, or if there is other evidence of a pre-existing primary mental transtorno com obsessive-compulsive or related symptoms (e.g., a history of prior episodes not associated com the unknown or não especificado psychoactive substance uso).