50 years ago it seemed that it was nonexistent. Now it is a household word in industrialized countries. Women report a tidal wave of symptoms a week to ten days before menstruation begins. It then goes away shortly thereafter. The hormone Progesterone has been wrongly accused of causing Premenstrual Syndrome.
Progesterone is the hormone that is high during that time of the period.
The actual data shows that woman with PMS actually have lower levels of progesterone than normal woman. This scientific data suggests that the cause of Premenstrual Syndrome is actually a relative lack of Progesterone. Presently there is no laboratory test. Diagnosis rests upon the range and monthly timing of symptoms. Good Diet and exercise helps.