Diseases of the oral mucosa represent one of the most difficult problems in dentistry due to the difficulties in diagnosis and treatment. A variety of clinical manifestations, the ability to affect different organs and tissues, the characteristics of pathogens, the possibility of their spread in almost all possible ways allowed the WHO Regional Office for Europe to classify herpesvirus infection as a group of diseases that determine the future of infectious pathology in the current century. The study of the incidence and characteristics of the clinical course of herpetic stomatitis is a necessary measure for planning dental care and improving the quality of diagnosis