Premenstrual dysphoric disorder (PMDD) is an illness associated with the luteal phase of the
menstrual cycle. It is characterized by severe
irritability, anxiety and anger. It is similar to premenstrual syndrome (PMS), but differs from it in severity and in that it requires treatment, because it interferes in a woman's ability to function in her
environment.
There is some question as to whether PMDD has been "marketed" by pharmaceutical companies in order to increase the demand for treatments.