A mixture of problems both physical and emotional.
Mood changes range from unusual aggressiveness to being out of control.
Changes to emotions are obvious but also breasts tend to become larger and more tender, increased fluid retention, stomach distension and some period pain. There seems to be no clear cut cause of pms. Suggested causes are allergies, hormone imbalances, nutritional imbalances, psychological factors, depression and genetic disposition towards pms. Supplements may help to readdress any nutritional imbalances. Evening primrose oil has become popular, but like any herbal treatment there are questions about unknown long term side affects.