The term "dysmenorrhea" refers to a wide range of neurovegetative, metabolic-endocrine, mental and emotional abnormalities, the leading manifestation of which is the pain syndrome caused by the pathological accumulation in the endometrium on the eve of menstruation of the degradation products of arachidonic acid (prostaglandins, thromboxanes, leukotrienes and monoamino acids), enhancing the afferentation of impulses, annoying pain centers in the central nervous system.