Relevance. Over the past 20 years, 48 cases of Norwegian scabies are described in the literature in Russia. A survey of 319 dermatologists in Russia indicates that it was met in practice by a third of specialists. The disease is most often recorded in neuropsychiatric hospital patients. The main diagnostic criteria for Norwegian scabies, systematized earlier in the monographs Scabies (1989), Parasitic Dermatoses: Scabies and Rat Tick Dermatitis (2003) and Scabies (2018), are supplemented with new data. A new case of Norwegian scabies in a patient with senile dementia is described. Study purpose: to increase the awareness of doctors about the frequency of registration and the peculiarities of the course of Norwegian scabies in Russia based on literature and our own clinical observations. Material and methods. Systematized data from scientific publications on Norwegian scabies over the past 20 years. Summarized the material of multi-year own studies. For the selection of literature used the Internet search engines Google Scholar, Cyberleninka, eLibrary, Sigla. Results. Dermatovenerologists in Russian Federation described 48 cases of Norwegian scabies. Of the 32 patients in the Sverdlovsk region, 78% lived in neuropsychiatric care home and asylum. Revealed for the first time 3 cases of reinfection. Currently, Norwegian scabies develops in patients with comorbid pathology. Described 15 diagnostic criteria for Norwegian scabies. Their practical application will make it possible to avoid diagnostic errors. Conclusion. Norwegian scabies is not a rare disease that occurs against the background of comorbid pathology. The main diagnostic criteria are scabietic burrows and crusts, the additional one is erythroderma. The treatment is long and based on a combination of scabicides and keratolytic drugs. The effectiveness of therapy is assessed by the dynamics of the clinic of the disease and laboratory (death of the mites). The presence of morphologically unchanged mites and eggs indicates the need for continued treatment with scabicides.