Background: The concept of dehumanization keeps pace with human history and means the denial of humanness to another human being. Purpose: The aim of this review is to study the literature in the field of mental health to investigate the existence of dehumanization. Method: A literature review was conducted from 2002 to 2022 using keywords in Google scholar, Pubmed, PsycInfo and Scopus Databases. Results: It seems that there are some mental disorders that have dehumanizing characteristics. Also the way the diagnostic manuals of mental disorders are used (DSM-5), the communication between specialist-patient, the labels and the stigma of the mental illness, the biogenetic explanations of the mental disorders and the characteristics of the psychiatric clinics. Conclusion: The literature review shows that patients with mental disorders experience dehumanization and therefore measures should be taken to prevent and limit the phenomenon.
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