Premenstrual Syndrome (PMS) includes irritability, mood swings, water retention, bloating, and headaches.  Interestingly, PMS can account for more than 50% of the sick leave women take at work. Research by National Institute of Health shows that women currently under stress have moderate to severe symptoms during menstruation. Solutions? Pick a sport - running, tennis, aerobic dancing, any kind of intensive exercise is helpful to boost serotonin levels (the ‘happy’ hormone). This helps to reduce or even prevent PMS. Plus, exercise is a good stress buster too!