If you've been told your PMDD is "just hormones", you've probably also been told to balance them.

But hormone levels in women with PMDD are typically no different from women without it.

So what's going on?

What Is PMDD?

Premenstrual dysphoric disorder (PMDD) is a severe, cyclical mood disorder. It affects an estimated 3 to 8% of menstruating women.

Symptoms appear in the luteal phase, ease within a few days of bleeding starting, and are mostly absent in the week after your period.

They may include:

• Marked irritability or anger
• Low mood or hopelessness
• Anxiety or feeling on edge
• Tearfulness and mood swings
• Brain fog
• Fatigue
• Sleep changes
• Appetite changes and cravings
• Feeling overwhelmed or out of control

This is not PMS with a stronger label. The defining feature is impairment: relationships, work and your sense of self.

The Hormone Levels Are Normal

In PMDD, symptoms follow ovarian cycling, but the hormones themselves are within normal range.

When the cycle is suppressed, symptoms settle. When oestrogen and progesterone return, so do the symptoms.

The trigger isn't the amount of hormone. It's how the brain responds to normal hormonal change.

Same hormones. Different response.

Where the Brain Comes In

Progesterone is metabolised into allopregnanolone, a neurosteroid that acts on GABA-A receptors, one of the brain's main calming pathways.

In most women, these receptors adapt as progesterone rises and falls across the cycle.

In PMDD, that adaptation appears to be impaired. The mechanism is still being explored, but it points to a nervous system sensitivity rather than a hormone deficiency or excess.

This pathway also overlaps with stress physiology, which is one reason stress load can shape how the luteal phase feels.

Why This Reframe Matters

• Normal hormone tests don't rule out PMDD. Results can look unremarkable in someone who is struggling.
• "Balancing hormones" is the wrong target. The question is why the nervous system is reacting the way it is.
• Tracking matters. Diagnosis requires daily symptom ratings across at least two cycles.
• It isn't a character flaw. It's a biological response, not a failure of coping.

Supporting PMDD

There is no single fix, and care is best coordinated with your GP.

Naturopathic support focuses on the foundations:

• Daily symptom tracking
• Stable blood glucose
• Sleep protection
• Regular movement
• Limiting alcohol
• Reviewing nutritional status

Support should always be individualised.

The Takeaway

PMDD isn't caused by abnormal hormone levels.

It's caused by a nervous system that responds to normal hormonal change differently.

Understanding that is often the first thing that makes sense of years of being told it's all in your head.