Period Pain: Why It Happens and What You Can Do About It Beyond Pain Relief
- 2 days ago
- 8 min read
You have been told that period pain is normal for women. So you've managed it with pain relief medication every month, and tried to push through. And you've accepted this as just how your cycles are, because the person who told you it was normal was a doctor, and there did not seem to be much else to say about it.
Period pain is extremely common. But common and normal are not the same thing, and pain that significantly affects your ability to function every cycle is not something to simply accept as a fixed feature of your physiology. It is driven by a specific mechanism, and that mechanism has identifiable drivers. When those drivers are addressed, pain changes.
Period pain is driven by prostaglandins. And excessive prostaglandin production is driven by oestrogen dominance, nutritional deficiencies, and systemic inflammation.
All of which can be treated.
How Common Is Period Pain?
Period pain, clinically termed dysmenorrhoea, affects up to 80 percent of women at some point in their reproductive lives, making it one of the most common reasons for missing work, school, and daily activities. Primary dysmenorrhoea, pain without an identifiable structural cause, accounts for the majority of cases. Secondary dysmenorrhoea, pain resulting from a structural condition such as endometriosis or adenomyosis, accounts for a significant proportion of more severe and progressive presentations (Samphire Neuroscience, 2026).
Despite this prevalence, period pain is one of the most undertreated symptoms in women's health. It is dismissed, normalised, and managed rather than investigated, which means most women never learn that there is a physiological explanation for the severity of their pain, or that addressing that explanation can change their experience of menstruation significantly.
The Prostaglandin Mechanism
Period pain is caused primarily by prostaglandins, a group of inflammatory signalling compounds produced by the uterine lining as it sheds during menstruation. Their physiological role is to trigger the smooth muscle contractions that help the endometrium expel. In a well-regulated cycle, this process produces mild cramping that is manageable and short-lived.
In women with significant period pain, prostaglandin production is excessive. The contractions are more intense, last longer, and the inflammatory response extends beyond the uterus into the broader pelvic environment. Elevated prostaglandins also enter systemic circulation, which is why period pain is often accompanied by nausea, headache, loose bowels, and fatigue, the body responding to circulating inflammatory compounds rather than purely localised uterine activity.
The question that is rarely asked is why some women produce so much more prostaglandin than others. The answer points consistently toward three overlapping drivers: hormonal imbalance, nutritional deficiency, and systemic inflammatory load.
Oestrogen Dominance and the Hormonal Driver
Oestrogen directly stimulates prostaglandin synthesis. The higher the oestrogen stimulus in the uterine lining, the more prostaglandins are produced when shedding begins. When oestrogen is high relative to progesterone, whether because oestrogen production is elevated, because oestrogen clearance is impaired, or because progesterone is insufficient to balance it, the prostaglandin response to menstruation is amplified.
This is one reason period pain so frequently accompanies other oestrogen dominance symptoms: heavy bleeding, breast tenderness in the premenstrual phase, mood changes before the period, and irregular cycles. These are all expressions of the same underlying hormonal imbalance, and addressing oestrogen clearance and progesterone adequacy reduces prostaglandin synthesis as one of its downstream effects.
Oestrogen clearance depends on adequate liver glucuronidation pathways and a gut microbiome that is not reactivating already-cleared oestrogen. Supporting both is relevant to reducing the oestrogen load on the uterine lining.
Nutritional Deficiencies: Magnesium and Omega-3
Two nutritional factors have the most robust evidence in relation to period pain: magnesium and omega-3 fatty acids. Both influence prostaglandin production through distinct but complementary pathways.
Magnesium
Magnesium inhibits prostaglandin synthesis and relaxes smooth muscle, including the uterine smooth muscle that contracts painfully during menstruation. Magnesium deficiency is extremely common in women, and its role in period pain is well supported by clinical trial evidence.
A 2024 randomised controlled trial published in the International Journal of Women's Health and Reproduction Sciences found that magnesium supplementation at doses of 150 mg and 300 mg significantly reduced pain severity in women with primary dysmenorrhoea compared to placebo. Research consistently shows that magnesium supplementation can ease the intensity of period cramps, and that the effect is cumulative across several cycles of consistent use (Samphire Neuroscience, 2026).
Omega-3 Fatty Acids
Omega-3 fatty acids, particularly EPA and DHA, influence prostaglandin metabolism at the enzymatic level. Arachidonic acid, an omega-6 fatty acid, is the precursor to the most pro-inflammatory prostaglandins involved in period pain. Omega-3 fatty acids compete with arachidonic acid for the same enzymes, shifting prostaglandin production toward less inflammatory pathways and reducing the overall inflammatory burden of menstruation.
A 2024 systematic literature review and meta-analysis published in Nutrition and Dietetics, conducted by researchers at Deakin University, examined the effect of omega-3 long chain polyunsaturated fatty acids on prostaglandin levels and pain severity in women with dysmenorrhoea. The review confirmed that omega-3 supplementation reduces pain severity and is a clinically relevant intervention for period pain. The mechanism involves reduction of pro-inflammatory prostaglandin precursors through competitive inhibition of arachidonic acid metabolism (Snipe et al., Nutrition and Dietetics, 2024).
A diet low in oily fish and high in refined seed oils shifts the fatty acid balance toward excess arachidonic acid and a more inflammatory prostaglandin profile. Addressing dietary fatty acid balance alongside supplementation where needed is a helpful and evidence-supported intervention.
Systemic Inflammation
Prostaglandin production doesn't happen in isolation from the broader inflammatory environment. The baseline from which the inflammatory response to menstruation starts is shaped by everything contributing to systemic inflammatory load: gut dysbiosis, dietary patterns, chronic stress, poor sleep, and environmental toxin exposure.
Gut dysbiosis is particularly relevant through two pathways. It drives systemic inflammation that raises the baseline prostaglandin response. And it impairs oestrogen clearance through the estrobolome, the collection of gut bacteria governing oestrogen metabolism, contributing to the oestrogen dominance that amplifies prostaglandin synthesis. A gut environment that is producing excess beta-glucuronidase, the enzyme that reactivates already-cleared oestrogen, is contributing to period pain through the hormonal pathway as well as the inflammatory one.
A diet high in refined carbohydrates and seed oils, both common features of modern dietary patterns, provides the substrate for pro-inflammatory prostaglandin production and reduces the anti-inflammatory counterbalance. Shifting toward whole foods, adequate protein, anti-inflammatory fats, and fibre that supports a healthy gut microbiome directly addresses the inflammatory environment in which menstruation occurs.
“The most consistent finding when I work with women who have significant period pain is that nobody has ever explained the mechanism to them. They have been told it is normal and given something to manage the pain, but the conversation about why their prostaglandin response is so amplified, which is almost always a combination of oestrogen dominance, low magnesium, inadequate omega-3, and a gut environment that is amplifying inflammation, has never happened. When we address those factors together, the change in pain across two to three cycles is usually significant. It is one of the most satisfying areas of practice because the results are so tangible and so consistent.”
- Gemma Knaap, Naturopath (BHSc Naturopathy, Certified Natural Fertility Educator, Gut Microbiome Analyst)
Southernwood Apothecary & Clinic
When Pain Warrants Further Investigation
Not all period pain is primary dysmenorrhoea driven by prostaglandins and inflammation. For some women, particularly those with severe or progressively worsening pain, the pain has a structural component that warrants specific investigation.
Endometriosis is a systemic, inflammatory condition in which tissue similar to the uterine lining grows outside the uterus on the bowel, bladder, peritoneum, and other structures. It produces pain through direct nerve involvement, inflammatory peritoneal fluid, and adhesions, mechanisms that extend beyond prostaglandin-driven cramping.
Signs that endometriosis or adenomyosis may be contributing include pain that begins before menstruation rather than with it, deep pelvic pain during intercourse, pain with bowel movements or urination during the period, and pain that has progressively worsened over time rather than remaining stable.
These presentations warrant investigation beyond the general inflammatory and hormonal approach. A thorough naturopathic assessment will identify whether the pattern of pain and symptoms is consistent with primary dysmenorrhoea or whether further medical investigation is indicated. Addressing the inflammatory and hormonal environment is relevant in both cases, and in endometriosis specifically it directly reduces the systemic drivers that sustain the condition.
Common Does Not Mean Inevitable
The degree of pain experienced during menstruation reflects the hormonal and inflammatory environment in which your period occurs. That environment is not fixed. It is responsive to targeted intervention, and when the right levers are identified and addressed, the change in how menstruation feels is real and often profound.
Pain that has been part of your cycle for years does not have to remain. And understanding what is driving it is the first step toward changing it. I would love to help you with this. In person consultations are available at my Albany clinic, or Telehealth consultations are available from anywhere in Australia.
Frequently Asked Questions
What causes period pain?
Period pain is caused primarily by prostaglandins, inflammatory compounds produced by the uterine lining as it sheds. In women with significant pain, prostaglandin production is excessive. The main drivers of excess prostaglandin production are oestrogen dominance, nutritional deficiencies particularly in magnesium and omega-3 fatty acids, and elevated systemic inflammatory load from gut dysbiosis, diet, and chronic stress. Structural conditions including endometriosis and adenomyosis produce additional mechanisms of pain beyond prostaglandins.
Does magnesium actually help period pain?
Yes. Magnesium inhibits prostaglandin synthesis and relaxes uterine smooth muscle. A 2024 randomised controlled trial found that magnesium supplementation significantly reduced pain severity in women with primary dysmenorrhoea compared to placebo. Magnesium deficiency is common in women, and consistent supplementation over several cycles often produces measurable improvement in pain for many women
How do omega-3 fatty acids reduce period pain?
Omega-3 fatty acids, particularly EPA and DHA, compete with arachidonic acid, the precursor to the most pro-inflammatory prostaglandins, for the same enzymes. This shifts prostaglandin production toward less inflammatory pathways and reduces the overall inflammatory burden of menstruation. A 2024 systematic review and meta-analysis in Nutrition and Dietetics confirmed that omega-3 supplementation reduces pain severity in women with dysmenorrhoea through this prostaglandin-modulating mechanism.
Can oestrogen dominance cause period pain?
Yes. Oestrogen directly stimulates prostaglandin synthesis in the uterine lining. When oestrogen is high relative to progesterone, whether due to elevated production, impaired clearance, or insufficient progesterone, the prostaglandin response to menstrual shedding is amplified. This is why period pain frequently occurs alongside other oestrogen dominance symptoms including heavy bleeding, breast tenderness, and premenstrual mood changes. Addressing oestrogen clearance through liver and gut health support reduces the prostaglandin stimulus.
When should period pain be investigated for endometriosis?
Signs that endometriosis or adenomyosis may be contributing to period pain include pain that begins before menstruation rather than with it, deep pelvic pain during intercourse, pain with bowel movements or urination during the period, and pain that has progressively worsened over cycles rather than remaining stable. Severe pain that significantly impacts quality of life also warrants investigation beyond primary dysmenorrhoea management. These presentations should be assessed by a gynaecologist alongside naturopathic support addressing the underlying inflammatory and hormonal environment.
Can a naturopath help with period pain?
Yes. A naturopath identifies the specific drivers of period pain for the individual, whether hormonal, nutritional, inflammatory, or a combination, and addresses them with targeted interventions. This includes assessment of oestrogen clearance and progesterone adequacy, nutritional status including magnesium and omega-3, gut health and inflammatory load, and the full cycle and symptom history. For women with suspected endometriosis or adenomyosis, naturopathic care addresses the systemic inflammatory environment alongside appropriate medical management.
About the Author
Gemma Knaap is a naturopath specialising in women's hormonal health, gut health, fertility, and reproductive wellbeing. She holds a Bachelor of Health Science in Naturopathy and is a Certified Natural Fertility Educator and Gut Microbiome Analyst. In person consultations are available at her Albany, WA clinic. Telehealth consultations are available across Australia.
References
Snipe, R.M.J. et al. (2024). Omega-3 long chain polyunsaturated fatty acids as a potential treatment for reducing dysmenorrhoea pain: Systematic literature review and meta-analysis. Nutrition and Dietetics, 81(1), 94-106. https://doi.org/10.1111/1747-0080.12835
Samphire Neuroscience. (2026). Does Magnesium Help Period Cramps? What the Science Says. https://www.samphireneuro.com/en-gb/blog/magnesium-and-the-menstrual-cycle
DITTO Daily. Omega-3 and Menstrual Symptoms. https://dittodaily.com/blogs/news/blog-post-2
Bofill Rodriguez, M. et al. (2022). Interventions for heavy menstrual bleeding: overview of Cochrane reviews and network meta-analysis. Cochrane Database of Systematic Reviews. https://doi.org/10.1002/14651858.CD013180.pub2
Cleveland Clinic. (2024). Dysmenorrhea: Painful Periods. https://my.clevelandclinic.org/health/diseases/4148-dysmenorrhea
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