Feeling Oppressed Is Oppressive: PMDD and Discrimination
In this research study, women who perceived discrimination due to race, gender, age, weight, height, or other factors were more likely to have PMDD.
I hadn't realized this was a cause of PMDD. The PMS Comfort article on causes discusses some of the more conventional theories on PMDD.
I'd be curious if anyone knows more about this, or has experienced it. The research article linked above is quite recent, June 2011.