PMDD, or premenstrual dysphoric disorder, is the most severe form of PMS, or premenstrual syndrome. The diagnostic criteria for PMDD are included in the American Pyschiatric Association's DSM-IV, 4th Edition, published in 1994. In addition to the physical and emotional symptoms required for diagnosis of PMS, at least one of the following criteria must occur during the late-luteal phase of the menstrual cycle.
- Feeling sad, hopeless, or suicidal
- Severe feelings of stress, tension, or anxiety or having panic attacks
- Mood swings that include bouts of crying
- Constant irritability or anger that affects other people
- Loss of interest in usual daily activities and relationships
- Inability to concentrate or focus
- Fatigue or loss of normal energy
- Food cravings or bingeing

