Final answer:
Premenstrual Dysphoric Disorder (PMDD) is characterized by severe and persistent irritability and mood changes that appear before menstruation and can disrupt daily life.
Step-by-step explanation:
The primary characteristic of Premenstrual Dysphoric Disorder (PMDD) is the enduring presence of intense irritability and mood alterations preceding menstruation. Distinguishing itself from typical mood swings, PMDD entails severe and debilitating symptoms, encompassing both emotional and physical challenges. Onset occurs approximately one to two weeks prior to menstruation, profoundly affecting daily functioning. Emotional symptoms may involve heightened irritability, anxiety, and depression. Additionally, physical symptoms like bloating and fatigue contribute to the syndrome's impact. PMDD necessitates careful monitoring and management to alleviate symptoms, involving lifestyle adjustments and, in severe cases, pharmacological interventions to enhance the overall well-being and quality of life for individuals affected.