Can adenomyosis period pain affect the brain: What New Research Suggests

Wu et al.’s 2025 MRI study suggests that adenomyosis-associated dysmenorrhea is linked with measurable differences in brain gray matter in regions involved in pain, memory, emotion, and sensory processing. What this means for the pain is that it is not “all in your head”; it supports the opposite: persistent menstrual pain can involve both the uterus and the brain’s pain-processing networks.

Adenomyosis can cause severe, worsening period pain, heavy bleeding, pelvic pain, and fertility concerns.

Wu and colleagues examined whether people with adenomyosis-associated dysmenorrhea also show structural differences in the brain that may help explain the overlap between chronic pain and emotional distress.

What is adenomyosis-associated dysmenorrhea?

Adenomyosis occurs when tissue similar to the uterine lining grows into the muscular wall of the uterus. Symptoms can include heavy or prolonged periods, increasingly painful periods, and pain during sex, although some people have no symptoms.

Adenomyosis-associated dysmenorrhea (AAD) means painful periods linked to adenomyosis. It can be more than a few difficult days each month: repeated pain episodes may affect sleep, work, relationships, mood, and how safe or manageable the body feels during the menstrual cycle.

What symptoms should you take seriously?

Consider discussing symptoms with a gynaecologist if you experience:

• Period pain that is severe, worsening, or stops you from functioning normally

• Heavy or prolonged menstrual bleeding

• Pelvic pain between periods or pain during sex

• Pain that does not improve enough with usual over-the-counter pain relief

• Menstrual pain alongside anxiety, low mood, irritability, or poor sleep

• Symptoms that are affecting work, college, caregiving, or quality of life.

Pelvic ultrasound and MRI can be used to investigate adenomyosis, particularly when symptoms and initial assessment suggest a uterine cause for pain or heavy bleeding.

What did Wu et al. study?

Wu et al. recruited 51 patients with adenomyosis-associated dysmenorrhea and 51 demographically matched healthy controls. They used structural MRI and a technique called voxel-based morphometry to compare gray matter volume across the brain.

Gray matter contains many of the brain’s nerve-cell bodies and plays a role in processing information. In this context, gray matter volume (GMV) differences are imaging observations—not proof that a specific brain area is permanently damaged, not a diagnostic test for adenomyosis, and not evidence that a person’s pain is imagined.

Which brain regions showed gray matter changes?

Compared with healthy controls, the AAD group showed significant GMV changes in:

• The right fusiform gyrus

• The right parahippocampal gyrus

• The right lingual gyrus

• The left superior frontal gyrus

• The bilateral thalamus

The paper’s most clinically interesting observation was that lower GMV in the right fusiform gyrus and right parahippocampal gyrus was significantly associated with pain and emotional-scale scores.

In plain language, the more pronounced some of these regional differences were, the more they related to reported pain and emotional symptoms within the AAD group.

What do these brain findings mean in everyday language?

The findings point to a pain-emotion connection. Pain is not processed by one isolated “pain centre”; it is shaped by attention, memory, threat detection, sensory input, stress, sleep, and emotional state. Wu et al.’s results add to the idea that persistent cyclical pelvic pain may be associated with changes in networks that help the brain interpret and respond to pain.

Important: these interpretations are biologically plausible, but the study does not establish that each region causes a specific symptom. Neuroimaging studies identify patterns and associations; they cannot diagnose an individual person’s pain severity, emotional health, or future outcome.

Does this mean adenomyosis pain is psychological?

No. Adenomyosis is a physical uterine condition, and dysmenorrhea can be severe and disabling. The study helps explain why physical pain and emotional wellbeing can influence each other without suggesting that either is less real.

A better way to view it is as a two-way loop:

Adenomyosis-related uterine pain
→ repeated pain signals and disrupted daily life
→ altered pain processing, stress, sleep, and emotional strain
→ pain may feel harder to cope with over time
→ symptoms can continue affecting mood and functioning.

This is why compassionate care should address the whole experience: bleeding and pelvic symptoms, pain relief, sleep, mental health, relationships, and the practical impact of difficult periods.

What were the study’s key findings?

Wu et al.’s study is notable because it directly examined structural brain differences in adenomyosis-associated dysmenorrhea. The key findings were:

• People with AAD had significant GMV changes in five reported areas: right fusiform, right parahippocampal, right lingual, left superior frontal gyrus, and both thalami

• The right fusiform and right parahippocampal gyri showed decreased GMV that correlated significantly with pain and emotional-scale scores

• The results support a possible neural basis for the overlap between chronic menstrual pain and emotional disturbance in AAD

• The study highlights that severe dysmenorrhea deserves assessment as a multidimensional health concern, rather than being dismissed as “normal period pain”

What are the limitations of this research?

The study is valuable, but it should not be overinterpreted. It included 102 participants total, so larger and more diverse studies are needed to see whether the findings hold across populations, disease severity, treatment histories, and coexisting conditions.

Other key limitations include:

• It cannot prove cause and effect. The study cannot tell us whether persistent pain led to GMV differences, whether pre-existing brain differences increased pain sensitivity, or whether both are influenced by other factors

• It is a snapshot in time. Longitudinal studies could show whether successful pain treatment changes symptoms, brain measures, or both

• It does not replace clinical care. A brain MRI is not currently a routine diagnostic tool for adenomyosis-associated dysmenorrhea

• Pain is individual. Imaging patterns cannot measure a person’s pain experience more accurately than listening to them and assessing symptoms carefully.

How can you use these findings in your own care?

The takeaway is not that you need a brain scan. The practical message is that severe period pain deserves early, comprehensive support—and that tracking symptoms can make medical appointments much more productive.

What should you track before your appointment?

Track for at least two to three cycles if possible:

• Bleeding days, flow level, clots, and spotting

• Daily pain score from 0 to 10

• Pain location: lower abdomen, back, thighs, bowel, bladder, or during sex

• Pain medicines used, timing, dose, and relief

• Nausea, fatigue, headaches, bowel changes, and sleep disruption

• Mood changes: anxiety, low mood, irritability, overwhelm, or pain-related fear

• Days missed from work, study, exercise, or social life

• Any pattern around ovulation, the premenstrual week, and menstruation

A symptom record can help a clinician identify patterns, assess treatment response, and distinguish adenomyosis symptoms from conditions that can coexist with it, such as endometriosis or fibroids.

What treatments may be discussed for adenomyosis pain?

Treatment should be individualised with a qualified clinician, especially if you are trying to conceive, have heavy bleeding, have other medical conditions, or experience significant mood symptoms. Common approaches may include pain medicines such as NSAIDs, hormonal options, and, in some cases, procedural or surgical care.

MedlinePlus notes that ibuprofen or naproxen may help manage pain, while hormonal birth-control options and progesterone-containing IUDs may help reduce heavy bleeding for some people. Hysterectomy may be considered for severe symptoms when other options are unsuitable and future pregnancy is not desired.[Read More]

Because adenomyosis treatment evidence and guidelines continue to evolve, decisions should be made with a gynaecologist who can consider your symptoms, ultrasound or MRI findings, fertility goals, bleeding-related anaemia risk, and mental wellbeing.

References

1. Wu Y, Chen Z, Liang M, et al. Gray matter alterations and pain-related emotional processing in patients with adenomyosis-associated dysmenorrhea: a neuroimaging perspective. Quantitative Imaging in Medicine and Surgery. 2025;15(11):11012–11021. doi:10.21037/qims-2025-764.[pubmed.ncbi.nlm.nih]

2. National Library of Medicine. Adenomyosis. MedlinePlus Medical Encyclopedia. Updated 2024.[nlm.nih]

3. Selntigia A, et al. Adenomyosis: An Update Concerning Diagnosis, Treatment, and Fertility. 2024.[pmc.ncbi.nlm.nih]

4. Gkrozou F, et al. Diagnosis and Treatment of Adenomyosis with Office Hysteroscopy—A Narrative Review. 2023.[pmc.ncbi.nlm.nih]

5. Ottolina J, et al. Endometriosis and Adenomyosis: Modern Concepts of Their Clinical Impact and Management. 2024.[pmc.ncbi.nlm.nih]