There are two types of menstrual pain: primary and secondary dysmenorrhea. Primary dysmenorrhea is believed to be caused by hyperactivity of the hormone prostaglandin and presents in women in their teens and 20s without any underlying medical issues. Secondary dysmenorrhea occurs when there are underlying problems in the uterus or pelvic organs that cause pain, which may develop in women who previously had painless periods. The document outlines natural remedies women can try to ease menstrual pain, such as using a heating pad, massage, exercise, and over-the-counter medications. It also mentions that birth control may help regulate periods and reduce pain.