7 Reasons You Gain Weight Overnight and What You Can Do About It

As if you needed another reason to love PMS, fluctuating hormone levels can actually cause you to retain water in the week before you get your period. The best way to fight water weight is by drinking plenty of water and eating a healthy diet, and it should disappear after your period, anyway. Unfortunately, I can't say the same about the weight gain from giving into those late-night PMS chocolate cravings . . .