pms

Premenstrual (pree-MEN-struhl) syndrome (PMS) is a group of symptoms linked to the menstrual cycle. PMS symptoms occur 1 to 2 weeks before your period (menstruation or monthly bleeding) starts. The symptoms usually go away after you start bleeding. PMS can affect menstruating women of any age and the effect is different for each woman. For some people, PMS is just a monthly bother. For others, it may be so severe that it makes it hard to even get through the day