Radon therapy is one of the methods of physiobalneotherapy the mechanism of action of which is believed to consist of the influence of the small radiation doses of radon and its daughter products on the nervous, vascular, and immune apparatuses of the skin and mucosal membranes that eventually enhances the protective and adaptive potential of the body and thereby its ability to resist pathological impacts. At present, the high effectiveness of radon therapy is universally recognized and this method is widely applied for the combined treatment of various diseases in different fields of medicine. These include (1) diseases of the musculoskeletal system and locomotor disorders in the patients presenting with recurrent rheumatic fever, reactive arthritis, ankylosing spondylitis, post-traumatic osteoarthrosis and knee joint synovitis, the sympathico-tonic course of vegetative dystonia associated with connective tissue dysplasia, etc.; (2) neurological disorders in the patients presenting with cervical dorsopathy, neurological manifedstations of degenerative lesions of the cervical and lumbar spine, etc.; (3) cardiological disorders in the patients presenting with hypertensive disease, coronary heart disease, atherosclerosis of different localization, etc.; (4) gastrointestinal disorders in the patients presenting with gastric and duodenal ulcers, irritated bowel syndrome, etc.; (5) gynecological problems in the patients presenting with primary and secondary dysmenorrhea, genital endometriosis, uterine myoma, dysregulated reproductive function, polycystic ovary — syndrome, polycystic ovary syndrome and ovulatory disorders of proinflammatory origin, etc.