Menstruation and Premenstrual Syndrome

"PMS" redirects here. For other uses, see PMS (disambiguation). Premenstrual Stress Syndrome (PMS, also called Premenstrual Stress, Premenstrual Tension Syndrome, PMT, Premenstrual Syndrome, Periodic Mood Swing) is stress which is a physical symptom prior to the onset of menstruation. PMS should not be confused with dysmenorrhea, which refers to pain or cramps during menstruation. PMS is exceedingly common, occurring in 75% of women of reproductive age during their lifetime. A more severe ...