Premenstrual Syndrome (PMS)
PMS refers to a wide range of physical or emotional symptoms that typically occur about 5-11 days before a woman starts her monthly menstrual cycle. The symptoms usually stop when, or shortly after, her period begins.

Premenstrual Dysphoric Disorder (PMDD)
PMDD is a condition in which a woman has severe depressive symptoms, irritability, and tension before menstruation . The symptoms of PMDD are more severe than those seen with premenstrual syndrome (PMS). PMDD affects between 3% and 8% of women during the years when they are having menstrual periods .

What causes PMS and PMDD?
PMS and PMDD are caused by fluctuations in ovarian hormones during the menstrual cycle. These hormonal changes cause fluctuations in brain chemicals responsible for mood. Women with PMDD have brains that are sensitive to these rapid changes in hormone levels. Additionaly, there is a genetic component to PMDD as it tends to run in families. 

What are symptoms of PMDD
The symptoms of PMDD are similar to those of PMS. However, they are generally more severe and debilitating and include a least one mood-related symptom. Symptoms occur during the week just before menstrual bleeding and usually improve within a few days after the period starts.

Five or more of the following symptoms must be present to diagnose PMDD, including one mood-related symptom:

  • No interest in daily activities and relationships
  • Fatigue or low energy
  • Feeling of sadness or hopelessness, possible suicidal thoughts
  • Feelings of tension or anxiety
  • Feeling out of control
  • Food cravings or binge eating
  • Mood swings with periods of crying
  • Panic attacks
  • Irritability or anger that affects other people
  • Physical symptoms, such as bloating, breast tenderness, headaches, and joint or muscle pain
  • Problems sleeping
  • Trouble concentrating

How is PMDD diagnosed?
No physical examination or lab tests can diagnose PMDD. A complete history, physical examination (including a pelvic exam ), and psychiatric evaluation should be done to rule out other conditions.

Keeping a calendar or diary of symptoms can help women identify the most troublesome symptoms and the times when they are likely to occur. This information can help diagnose PMDD and determine the best treatment.


Please remember this information is intended for educational purposes only and should not substitute medical advice from a healthcare provider.