Premenstrual dysphoric disorder (PMDD) is a severe and disabling form of Premenstrual syndrome (PMS) and affects about 3-9% of menstruators. You may be able to receive support for PMDD as a disability depending on where you live. This is a great resource for those in the United States. No matter where you live, it is best to speak to your doctor about the best steps to take if you experience debilitating pain when menstruating. Find out more about what PMDD is.