What Health Conditions Commonly Occur With PMDD? New 2026 Study Explained

PMDD and Comorbidities: What the 4,047-Participant Our Future Health Study Means for Your Care

PMDD is not “just PMS” or simply a mental-health condition. A 2026 preprint by Steyn and colleagues, analysing 4,047 participants in the UK Our Future Health cohort, examines how PMDD can overlap with both mental and physical health conditions—an important reminder that whole-person care matters.

Important: This research is a preprint, meaning it has not yet completed peer review. It can offer useful early evidence, but its findings should not be treated as final clinical guidance.

What Is PMDD?

Premenstrual dysphoric disorder (PMDD) is a cyclical, hormone-sensitive condition in which emotional, behavioural, and physical symptoms occur in the luteal phase—the days or weeks before a period—and improve shortly after bleeding begins. A key diagnostic feature is this repeated timing in relation to the menstrual cycle.

Common PMDD symptoms can include:

• Intense irritability, anger, anxiety, sadness, or hopelessness

• Mood swings and feeling emotionally overwhelmed

• Low energy, poor concentration, or sleep changes

• Bloating, breast tenderness, headaches, joint or muscle pain

• Changes in appetite, cravings, or a sense of losing control

• Symptoms that interfere with relationships, work, studies, or daily life

PMDD is a recognised health condition, and professional guidance supports a range of evidence-based options, including psychological care, medication, hormonal treatment, lifestyle measures, education, and self-management strategies.

What Did the Steyn et al. PMDD Comorbidity Study Look At?

The preprint, titled Physical and Mental Health Comorbidities of Premenstrual Dysphoric Disorder: Analysis of 4,047 Participants in Our Future Health, used data from the UK’s Our Future Health cohort to investigate the health conditions reported alongside PMDD.

In plain language, the study asks an important question: when someone has PMDD, what other physical or mental health diagnoses may also be part of their health picture?

That question matters because many people with PMDD are told to focus on only one symptom at a time—such as anxiety, pain, fatigue, low mood, migraines, or digestive concerns—without anyone checking whether those symptoms form a cyclical pattern.

What Does “Comorbidity” Mean?

A comorbidity is a health condition that exists alongside another condition. It does not automatically mean that one condition caused the other.

For example:

This distinction is essential. A large cohort study can identify patterns and associations, but it cannot by itself prove that PMDD causes another diagnosis—or that another diagnosis causes PMDD.

What Hormone-Related Conditions Did the Study Identify?

The study’s findings point to overlap between PMDD and hormone- or reproductive-health-related conditions. This is biologically plausible because PMDD is understood as an increased brain-body sensitivity to normal cyclical changes in reproductive hormones, rather than necessarily having “abnormal hormone levels."

1. Endometriosis had 2.2X higher odds

2. PCOD had 1.9X more chance

3. Benign Breast Disease had 2X higher odds

For people with PMDD, it can be useful to discuss the following with a qualified clinician when symptoms suggest them:

• Irregular, very painful, very heavy, or absent periods

• New acne, excess facial/body hair, or scalp-hair changes

• Major weight changes without a clear explanation

• Symptoms of thyroid dysfunction, such as persistent fatigue, temperature sensitivity, palpitations, or bowel changes

• Pelvic pain, painful sex, or pain with bowel movements around periods

• Fertility concerns or major changes after starting, stopping, or changing hormonal contraception

What Neurodevelopmental Conditions Were Found Alongside PMDD?

The analysis also includes neurodevelopmental conditions among the health areas seen alongside PMDD. This is particularly relevant for people with ADHD, autism, learning differences, sensory sensitivities, executive-function challenges, or emotional-regulation difficulties.

1. ADHD- 2.2X higher odds

2. Autism- 1.9X higher odds

3. Developmental Learning Disorders- 1.5X higher odds

PMDD does not cause ADHD or autism. However, hormonal-cycle changes may make existing challenges feel harder to manage in the luteal phase, for example:

• More difficulty starting or completing tasks

• Greater sensory overload or social exhaustion

• Increased rejection sensitivity or emotional intensity

• More trouble with sleep, routine, concentration, or memory

• A sharper drop in capacity at work, college, or home

What Digestive and Liver Conditions Were Included?

Digestive and liver conditions were also part of the broader physical-health picture examined in the study. Digestive symptoms can be common before periods, but recurring or severe symptoms should not be written off automatically as “normal PMS.”

1. Coeliac Disease- 2X higher odds

2. GORD- 1.5X higher odds

3. Fatty Liver- 1.4X higher odds

4. Inflammatory Bowel Disease- 1.4X higher odds

Track and discuss symptoms such as:

• Nausea, constipation, diarrhoea, bloating, reflux, or abdominal pain

• Appetite changes, food aversions, or intense cravings

• Digestive symptoms that worsen before bleeding and ease after it starts

• Symptoms that occur throughout the month, not only premenstrually

• Yellowing of the skin or eyes, dark urine, pale stools, swelling, or persistent upper-right abdominal pain

Liver warning signs—including jaundice, very dark urine, pale stools, or persistent abdominal pain—need prompt medical assessment. Do not wait to see whether they resolve with your period.

What Nutritional and Metabolic Conditions Were Found?

Steyn et al. also identifies nutritional and metabolic health as part of the comorbidity picture around PMDD. This does not mean that nutrition “causes” PMDD or that changing your diet can replace medical care; PMDD is linked to heightened sensitivity to normal reproductive-hormone shifts.

1. Lactose Intolerance

2. Vitamin D Deficiency

3. Vitamin A Deficiency

4. Underactive Thyroid

5. High Cholesterol, have all reported higher odds as well.

However, nutritional and metabolic factors can affect energy, mood, sleep, concentration, appetite, and physical comfort—symptoms that may already be challenging during the luteal phase.

Consider seeking medical advice if you notice:

• Ongoing fatigue, dizziness, breathlessness, or palpitations

• Restrictive eating, binge eating, frequent skipped meals, or food-related distress

• Rapid or unexplained weight change

• Constant thirst, frequent urination, shakiness, or repeated energy crashes

• Symptoms suggesting nutrient deficiency, such as weakness, hair shedding, mouth ulcers, or tingling

• A personal or family history of diabetes, thyroid disease, high cholesterol, or metabolic conditions

How Can You Track These Findings Without Becoming Overwhelmed?

You do not need to track every possible condition. Start with the symptoms that most disrupt your life and use HealCycle to identify whether they change with your menstrual cycle.

Why Does PMDD Often Overlap With Mental Health Concerns?

PMDD can cause clinically significant mood symptoms in a predictable premenstrual pattern. Because anxiety, depression, irritability, sleep disruption, and emotional distress can also occur outside the menstrual cycle, PMDD may be mistaken for a non-cyclical mental-health condition—or may coexist with one.

This does not mean that symptoms are “all in your head.” It means mental health deserves the same serious, compassionate attention as physical health, especially when symptoms repeat monthly.

What Should You Notice?

Ask yourself:

• Do anxiety, low mood, anger, panic, or intrusive thoughts become noticeably worse before your period?

• Do these symptoms ease within a few days of your period starting?

• Do you have a relatively symptom-light window after your period?

• Are you receiving treatment for depression or anxiety but still noticing a strong menstrual pattern?

• Do symptoms affect your safety, work, studies, sleep, relationships, or ability to care for yourself?

The timing matters. Tracking daily symptoms across at least two cycles can help a clinician distinguish PMDD from a condition that is present throughout the month, or identify both when they occur together. The cyclical relationship between symptoms and menstruation is central to PMDD assessment.

Can PMDD Also Affect Physical Health?

Yes—PMDD includes physical symptoms, and the Steyn et al. study specifically explores physical as well as mental-health comorbidities. This is a useful shift away from treating PMDD as only a mood problem.

Physical symptoms that may need separate attention include:

• Headaches or migraines

• Fatigue and low energy

• Sleep problems

• Breast tenderness and bloating

• Muscle or joint pain

• Appetite changes and gastrointestinal symptoms

• Pelvic pain or unusually painful periods

A symptom being cyclical does not mean you should automatically dismiss it as PMDD. New, severe, persistent, or worsening symptoms may need evaluation for other conditions too.

How Can You Tell Whether It Is PMDD, Another Condition, or Both?

The most helpful starting point is not trying to diagnose yourself from one difficult week. It is collecting a clear, daily record.

Use This Symptom-Tracking Guide

A clear record gives you language beyond “I feel awful before my period.” It can show: “My anxiety rises around 10 days before bleeding, peaks in the final three days, and improves by day two of my period.”

That is valuable information for a gynaecologist, psychiatrist, psychologist, GP, or other qualified clinician.

What Does This Study Change About PMDD Care?

The biggest takeaway is not that every person with PMDD has the same additional diagnoses. Instead, it is that PMDD care should be integrated.

Professional guidance from the American College of Obstetricians and Gynecologists (ACOG) recognises that many people benefit from a multimodal plan rather than a one-size-fits-all approach. This can combine medication or hormonal care, psychological counselling, exercise or nutrition strategies, education, and self-help measures.

What Could Whole-Person Care Look Like?

• Discussing cyclical mood symptoms with a mental-health professional

• Reviewing headaches, pain, sleep, fatigue, or digestive symptoms with a doctor

• Asking whether your current treatment plan accounts for menstrual-cycle changes

• Exploring evidence-based PMDD treatments rather than relying only on willpower

• Bringing a symptom diary to appointments

• Checking in more often during the luteal phase if that is your highest-risk time

Your care should not force you to choose between “mental” and “physical” symptoms. Both are real, both deserve attention, and both may affect each other.

What Should You Do If PMDD Symptoms Feel Unmanageable?

Start with safety. If you are having thoughts of self-harm, suicide, or feel unable to stay safe, contact local emergency services, go to the nearest emergency department, or reach out to a trusted person who can stay with you. Do not wait for symptoms to pass on their own.

For ongoing care, consider booking an appointment if:

• Symptoms interfere with work, education, caregiving, or relationships

• You feel depressed, panicked, hopeless, or emotionally unsafe before periods

• Symptoms are worsening or changing

• Pain, bleeding, headaches, fatigue, or digestive symptoms are severe

• You suspect PMDD but have never tracked symptoms across cycles

• Your existing depression or anxiety treatment does not account for cyclical worsening

ACOG’s clinical guideline supports evidence-based treatment options across medication, hormonal approaches, counselling, lifestyle support, education, and self-management; the best choice depends on your symptoms, medical history, preferences, and contraception needs.

Why Does This Research Matter?

The Steyn et al. preprint adds to a growing case for taking PMDD seriously as a condition that can affect many parts of life and may sit alongside other health needs. It also highlights why diagnosis, research, and support should look beyond stereotypes about periods and mood.

If you live with cyclical symptoms, you deserve care that asks more than, “Are you stressed?” You deserve someone to ask, “What happens across your cycle, and what support do you need?”

References

1. Steyn et al. Physical and Mental Health Comorbidities of Premenstrual Dysphoric Disorder: Analysis of 4,047 Participants in Our Future Health. Preprint, 2026. Available via SSRN.[papers.ssrn]

2. American College of Obstetricians and Gynecologists. Management of Premenstrual Disorders: ACOG Clinical Practice Guideline No. 7. Obstetrics & Gynecology. 2023;142(6):1516–1533.

3. Mishra S, et al. Premenstrual Dysphoric Disorder. StatPearls, National Center for Biotechnology Information, National Institutes of Health. Updated 2023.[ncbi.nlm.nih]