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