About This Condition
Premenstrual syndrome (PMS) is a poorly understood complex of symptoms occurring a week to ten days before the start of each menstrual cycle.
PMS is believed to be triggered by changes in progesterone and estrogen levels.
Many premenopausal women suffer from symptoms of PMS at different points in their menstrual cycle. Symptoms include cramping, bloating, mood changes, and breast tenderness tied to the menstrual cycle.