Premenstrual syndrome is used to refer to the problems, including strain and tiredness, that many women experience before menstruation. The abbreviation PMS is often used.
About 70% of women suffer from premenstrual syndrome.
premenstrual syndrome in British English
or premenstrual tension
noun
a group of symptoms, including nervous tension and fluid retention, any of which may be experienced as a result of hormonal changes in the days before a menstrual period starts
Abbreviation: PMS, PMT
premenstrual syndrome in American English
a group of physical and emotional symptoms that may precede a menstrual period, as fluid retention, fatigue, depression, irritability, etc.