Snapping randomly at anyone around for no plausible reason could be a common phenomenon before your periods start. 'You just have your usual mood-swings' 'it's natural stop over-reacting' 'every woman goes through this' are common statements that women hear while they are on their menses. However this could be all too disturbing if this is told to someone with a disorder which causes severe mood-swings to those in their periods. Globally about 2 per cent of women experience what is called as premenstrual dysphoric syndrome while obviously a lot of women experience premenstrual syndrome. 'Many women experience mood changes before