Premenstrual syndrome (PMS) is a complex of physical and psychological symptoms experienced by most women that occurs cyclically after ovulation, up to 2 weeks before their monthly menstrual period. The symptoms can vary from month to month in intensity but usually improve shortly after menstruation starts. Symptoms of PMS may be emotional, psychological or physical in nature. Some of the more common symptoms include abdominal pain, headaches, breast tenderness, bloating, irritability, depression, anxiety, tension, fatigue and anger. It is estimated that 80% of menstruating women experience premenstrual emotional or physical changes with peak occurrences among women in their late 20s and early 30s. About 30% of women consider their PMS symptoms to be problematic, while 5 – 10% consider them to be debilitating and require medical intervention to manage their mood and behaviour changes