The term dysmenorrhea is used to describe the presence of pelvic pain that occurs during the menstrual period.
Dysmenorrhea can be primary or secondary. Primary dysmenorrhea occurs in young women without alterations in the pelvis that can occur from the onset of menstruation, the pain begins the first day of the period and may last 24 to 72 hours. Secondary dysmenorrhea is due to the presence of other changes in the uterine region: fibrosis, inflammation of the lining of the uterus, uterine malformations.
This pain may be due to the release of certain substances in menstruation that cause narrowing of the arteries that nourish the uterus, causing uterine contractions that are causing pain.