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The aim of the study was to highlight the aspect of oral and cutaneous changes in anorexia nervosa (AN) as a purging type. On the basis of three clinical cases, a description has been made of the beginning and the possible course of the disease, teeth, oral mucosa, and skin changes resulting from the illness. The research method was based on the analysis of the available literature on AN supplemented by clinical experience of presented cases. On the basis of the interdisciplinary analysis, it was concluded that the appropriate diagnosis and treatment of AN are possible only with the collaboration of many specialists—psychiatrist or pediatric psychiatrist, general practitioner, dermatologist, dentist, and if necessary other medical specialists. In this context, psychotherapy is an integral aspect of treatment. Therefore, early intervention is essential to obtain good results of treatment.

Bulimia nervosa is a serious and complex health problem encountered by many professionals, including general practitioners and dentists. The aim of the study was to describe the problem of bulimia (its prevalence, symptoms, special situations, treatment), with particular emphasis on the aspect of the oral health. The paper presents the causes and factors contributing to the disease, diagnostic criteria, the onset and the possible course of the disease, dental and oral mucosa pathologies due to bulimia as well as other comorbidities (including diabetes). The paper is of descriptive nature. The research method was based on the analysis of the available literature on bulimia nervosa supplemented by our own experience. It was concluded based on the analysed sources that appropriate diagnosis and treatment of bulimia nervosa is possible only with the cooperation of many specialists: psychiatrists or paediatric psychiatrists, dentists and general practitioners as well as other doctors if necessary. Psychotherapy is a necessary and integral aspect of treatment. Early treatment onset is essential for good treatment outcomes. Due to the low sense of illness, some patients would never meet a psychiatrist if not for the intervention of a family doctor or a dentist.