What Causes PMS?
The bad news is that no one really knows the exact reason. What doctors and scientists do know is that it’s related to the way your body’s hormones change
through your monthly cycle.
Who Gets PMS?
The Mayo Clinic
estimates about 75 percent of women get at least some form of PMS. So if you have PMS, one thing’s for sure – you’re not alone! Although not every girl gets them, PMS symptoms can actually last through your period, too. If you don’t get them, consider yourself lucky.
Sources: