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What Is The Difference Between PMS vs PMDD?

Premenstrual Syndrome vs Premenstrual Dysphoric Disorder (PMDD): What’s the Difference?

As a psychiatrist specialising in hormone imbalances and their impact on mental health, I often encounter patients who experience a wide range of symptoms related to their menstrual cycle. Two common conditions that can affect women during this time are Premenstrual Syndrome (PMS) and Premenstrual Dysphoric Disorder (PMDD). While both share some similarities, they are distinct in several ways, and understanding these differences is crucial for effective diagnosis and treatment.

Premenstrual Syndrome (PMS):

PMS is a term many people are familiar with, as it affects a significant portion of menstruating women. It typically occurs in the week or two leading up to menstruation and is characterised by a variety of physical and emotional symptoms. These symptoms may include:

  1. Mood swings: Patients with PMS can experience irritability, anxiety, or sadness.
  2. Physical symptoms: Common physical symptoms include bloating, breast tenderness, and fatigue.
  3. Changes in appetite: Some individuals may have food cravings or increased hunger.
  4. Sleep disturbances: PMS can disrupt sleep patterns, leading to insomnia or excessive sleepiness.
  5. Headaches and joint pain: These symptoms are often reported during PMS.

It’s important to note that while PMS symptoms can be distressing, they are generally not severe enough to significantly interfere with daily functioning or quality of life. They typically resolve once menstruation begins.

Premenstrual Dysphoric Disorder (PMDD):

PMDD, on the other hand, is a more severe and less common condition. It shares many symptoms with PMS, but these symptoms are more intense and can have a profound impact on a person’s mental health and overall well-being. The main symptoms of PMDD include:

  1. Severe mood disturbances: PMDD is often associated with intense sadness, hopelessness, and severe mood swings. These emotional symptoms can be very debilitating.
  2. Physical symptoms: While physical symptoms are also present in PMDD, they tend to be more pronounced and can include severe fatigue, muscle aches, and heart palpitations.
  3. Interference with daily life: PMDD significantly disrupts a woman’s ability to function in their daily activities, including work, relationships, and self-care.
  4. Timing and duration: PMDD symptoms typically emerge in the luteal phase of the menstrual cycle (the two weeks before menstruation) and start to improve shortly after menstruation begins.

Diagnosis and Treatment:

Distinguishing between PMS and PMDD is crucial for appropriate treatment. A thorough assessment by a healthcare provider is necessary to make an accurate diagnosis. This may involve tracking symptoms over several menstrual cycles, ruling out other underlying conditions, and considering a patient’s medical and psychiatric history.

PMS Treatment: Management of PMS often focuses on symptom relief. This can include lifestyle changes, such as regular exercise, a balanced diet, and stress reduction techniques. In some cases, hormonal treatments to alleviate specific symptoms may be recommended.

PMDD Treatment: PMDD treatment is typically more intensive and may involve hormone treatments, antidepressant medications, cognitive-behavioral therapy (CBT), or other psychotherapies.


While PMS and PMDD share some similarities in terms of symptoms, PMDD is a distinct and more severe condition that significantly impacts a person’s mental health and daily life. As a psychiatrist specialising in hormone imbalances and their effects on mental health, I emphasize the importance of seeking professional evaluation and treatment when dealing with these conditions. Effective management can lead to improved quality of life and mental well-being for individuals experiencing PMS or PMDD. If you or someone you know is struggling with these symptoms, don’t hesitate to seek help from a qualified healthcare provider.

If you think you may suffer from PMDD and would like a diagnosis by an expert, we can help you in our PMS treatment clinic so please don’t hesitate to contact us at The Hormone Clinic or Book an Appointment

We really can get you back to feeling yourself again.