What is the Difference Between PMS and PMDD?

PMS and PMDD differ primarily in severity and functional impact. Many people have one or more premenstrual symptoms, such as bloating, mood changes, and breast tenderness, during the luteal phase, but fewer have symptoms that meet criteria for PMS. PMDD is a severe premenstrual disorder. Diagnosis requires at least five specified symptoms, including at least one key mood symptom, that cause significant distress or interfere with work, relationships, or daily activities. Clinicians generally confirm the pattern with daily symptom ratings across at least two menstrual cycles and rule out other conditions. PMDD symptoms are debilitating enough to interfere with functioning, while PMS symptoms are manageable for most women. Symptoms typically develop in the week or two before menstruation and improve within a few days after bleeding begins. People with severe or disruptive symptoms should seek a clinical evaluation; treatment may include lifestyle measures, antidepressants, hormonal treatment, or other options based on individual needs.