How common is PMS?
Estimates of the percentage of women affected by PMS vary widely. According to the American College of Obstetricians and Gynecologists, at least 85 percent of menstruating women have at least one PMS symptom as part of their monthly cycle. Most of these women have symptoms that are fairly mild and do not need treatment. Some women (about three to eight percent of menstruating women) have a more severe form of PMS, called Premenstrual Dysphoric Disorder (PMDD). See the question, “What is Premenstrual Dysphoric Disorder (PMDD)?” below for more information.