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1 Menstrual cramps are pains felt in the lower abdomen, occurring both before and during a woman's menstrual period. 2  The pain can be slight or sometimes extremely severe. 3  There are two types of painful periods-primary and secondary dysmenorrhea. 4  About 15% of women describe menstrual pain as severe.ast facts on menstrual cramps. Here are some key points about menstrual cramps. More detail and supporting information is in the main article. 1  Menstrual cramps are pains felt in the lower abdomen, occurring both before and during a woman's menstrual period. 2  The pain can be slight or sometimes extremely severe.
Dysmenorrhea is a medical term that means âdifficult or painful periodsâ. There are two types of dysmenorrhea; primary and secondary. Primary dysmenorrhea is the most common kind of dysmenorrhea. Cramping pain in the lower abdomen (belly) can start from 1â2 days before your period begins and can last 2â4 days.