Rosacea is a common chronic inflammatory polyetiological disease that affects mainly the central region of face and is characterized by periods of remission and exacerbation. According to various authors, the prevalence of rosacea among the population in the world is 10%. This pathology is often observed in patients with I and II phototypes of skin by T. Fitzpatrick. Rosacea is the 7th most common skin disease and accounts for 3-10% of skin pathology. Many authors consider rosacea to be a polyetiological disease, in pathogenesis of which exogenous (solar insolation, cold) and endogenous (pathology of gastrointestinal tract, endocrine and immune systems, cardiovascular diseases, psychoneurological disorders, vegetative disorders, etc.) factors play a significant role. The article presents data on the incidence of comorbid diseases in rosacea patients, also with accordance to the severity of disease. The analysis showed that 74.6% of patients with rosacea had various pathologies of the visceral organs. The incidence of psychoneurological disorders (depression, anxiety symptoms) and arterial hypertension in the examined patients increased as the disease’s severity progressed.