Most women are familiar with Premenstrual syndrome (PMS) and its symptoms, such as bloating, breast tenderness, irritability and mood swings. Premenstrual dysphoric disorder (PMDD) has similar symptoms but they are more severe, often interfering with a woman's daily activities. According to the National Institutes of Health, between 3 and 8 percent of women suffer from PMDD each month, usually for anywhere from 5 to 11 days before the start of their period and ending shortly after it begins.
