Primary dysmenorrhea is menstrual pain in women that is not associated with an underlying pathology. In this case, menstrual pain occurs as a natural side effect of the menstruation process itself.
Prostaglandins may be involved in the origin of this type of dysmenorrhea. These molecules are produced normally during menstruation and produce uterine contractions that help expel the endometrium. However, these contractions may cause menstrual pain, especially if prostaglandin levels are elevated.