---
title: What causes PMDD? | Niyora
description: PMDD happens when the brain is too sensitive to hormonal changes during the menstrual cycle. Many brain systems are involved, but most of the mechanisms still
url: https://niyora.com/research/papers/making-sense-of-pmdd-a-cycle-dependent-neurobiological-perspective-2026/
---

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- What causes PMDD?

Review, 2026

# What causes PMDD?

PMDD happens when the brain is too sensitive to hormonal changes during the menstrual cycle. Many brain systems are involved, but most of the mechanisms still need direct testing.

 Early or limited evidence

Research on PMDD in women

## What they did

Narrative review integrating research on PMDD's brain biology, psychology, relationships, and diagnosis.

## What they found

PMDD involves neurosteroid sensitivity, altered GABA signaling, changes in emotion networks, memory problems, and attention difficulties. It often co-occurs with ADHD and involves shared regulatory problems.

## What it means for you

PMDD is about brain sensitivity to hormones, not abnormal hormone levels. Doctors need to assess cyclical patterns to avoid misdiagnosis. However, many proposed mechanisms are still hypothetical and need testing.

## About the study

Original title Making Sense of PMDD: A Cycle Dependent Neurobiological Perspective Authors Chad Thomas Journal Zenodo (CERN European Organization for Nuclear Research) Year 2026 Study design Review What was tested None (narrative review) Open access Yes Read the paper [doi.org/10.5281/zenodo.23106666](https://doi.org/10.5281/zenodo.23106666) Original abstract

This preprint is a narrative review integrating neurobiological, psychological, relational, and diagnostic research on Premenstrual Dysphoric Disorder (PMDD). The manuscript synthesizes evidence on neurosteroid sensitivity, GABAergic variability, corticolimbic network differences, salience processing, interoception, executive functioning, and emotional regulation, with additional conceptual interpretations offered where empirical data are limited. The review also examines the interaction between PMDD and ADHD, highlighting shared regulatory vulnerabilities and the clinical relevance of their overlap. Relational and diagnostic implications are discussed, including the risk of misclassification when cyclical patterns are not assessed. Because this is a narrative review, several proposed mechanisms—such as interoceptive variability, episodic memory disruption, and dual‑system models of attachment and emotion regulation—are conceptual hypotheses that require direct empirical testing. The manuscript aims to clarify PMDD as a hormonally sensitive, predominantly cycle‑dependent form of dysregulation that benefits from cycle‑informed assessment, prospective tracking, and careful differential diagnosis.

Reproduced under CC-BY.

## Topics

[Premenstrual dysphoric disorder (PMDD)](https://niyora.com/research/topics/condition-pmdd/)[Mood swings and emotion regulation](https://niyora.com/research/topics/symptom-emotional-regulation/)[Cognition, concentration and memory](https://niyora.com/research/topics/symptom-cognition/)[Neurosteroids (allopregnanolone)](https://niyora.com/research/topics/treatment-neurosteroids/)[ADHD](https://niyora.com/research/topics/comorbidity-adhd/)

Research tells you what helps on average. Niyora helps on the day it hits.

Calm down, see it another way, and decide what to say, with a PMS and PMDD app built by a doctor.

## Related studies

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Cohort study, 2023

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How do menstrual cycle hormones affect the brain and cause mood disorders like PMDD?

Survey study, 2026

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