What causes PMDD?
That's a question that researchers are still trying to answer.
The cause of PMDD has not yet been determined, but many factors may be involved, including sensitivities to normal hormone fluctuations and to chemicals in the brain.
Like mother, like daughter: the family connection
It's also likely that, to some degree, PMDD is inherited. If your mother had PMDD, the chances are greater that you'll have it too. And in studies of twins, 93% of identical twins (who share the same genetic makeup) both had PMDD, while non-identical twins (fraternal) shared the condition only 44% of the time.
The good news is that research into PMDD continues. You can look forward to a better understanding of the causes. And, hopefully, more advanced ways to treat it.