Severe and chronic medical condition (often referred to as extremely severe PMS) that usually starts 7-10 days before a woman's period begins and continues throughout the course of a woman's period
Classed as a reproductive health disorder, as well as a mental health disorder due to both physically and mentally debilitating symptoms
Not enough research on the disorder to identify specific causes or risk factors
Assumed to be a sensitivity to normal hormonal fluctuations that occur during the menstrual cycle, specifically those within the luteal phase (post-ovulation) and is considered linked to serotonin deficiency
Affects up to 3-8% of women of reproductive age
Symptoms of PMDD are so severe that women have trouble functioning at home, at work, and in relationships during this time. This is markedly different than other times during the month
To be considered for PMDD, a woman must have at least five of the symptoms listed to the right starting 7-10 days before every period