Period Pain, Stress, Anxiety and Sleep: What is the Connection?
Period pain is one of the most common reasons girls and women miss school or work. Yet it is often dismissed, labelled as "normal" and left untreated. While there are clinical reasons for period pain, stress, anxiety and sleep also contribute to pain severity, and if left unaddressed, persistent menstrual pain can develop into a chronic pain syndrome with lasting effects on wellbeing. Understanding the pain system is key to understanding and addressing painful periods, or primary dysmenorrhea.
What is primary dysmenorrhea?
Primary dysmenorrhea is the medical term for painful periods that occur without an underlying condition such as endometriosis or fibroids. It is defined as recurring menstrual pain – typically cramping or aching in the lower abdomen – that begins around the start of a period, usually lasting two to three days.
It is extremely common, affecting between 45% and 95% of women who menstruate, and is one of the leading causes of absenteeism from school and work. Despite this, primary dysmenorrhea is frequently undertreated.
Period pain is driven primarily by prostaglandins, which are inflammatory chemicals that cause the uterine muscle to contract during menstruation. However, prostaglandin levels alone do not fully explain why some people have significantly more pain than others, which is why the pain system itself matters.
The role of stress and anxiety
Stress and anxiety have direct effects on how the body perceives and processes pain. Research has found that this relationship is two-way: pain drives stress and anxiety, and stress and anxiety drive pain.
A 2025 systematic review found that people reporting high perceived stress had nearly three times the likelihood of more severe period pain. Sustained stress causes changes in the brain and the body's stress hormone system that make pain signals feel more intense, not less. Anxiety works in a similar way – people with higher anxiety tend to have a lower pain threshold and a heightened pain response, not because they are imagining pain, but because the nervous system is amplifying those signals.
The role of sleep
Sleep and pain are closely connected. Period pain disrupts sleep, but poor sleep also worsens pain, impairing the body's own pain control pathways that naturally dampen down pain signals. Studies have specifically found that poor sleep quality is associated with more severe period pain, meaning someone sleeping poorly may experience their period pain as more intense than it might otherwise be.
So what is actually happening in the pain system?
For many people with primary dysmenorrhea, especially those with more severe pain, the pain system itself has become more sensitive – consistent with the concept of central sensitisation, where the central nervous system turns up pain signals beyond what the underlying tissue inflammation alone would suggest.
Studies have found higher pain reactivity not just in the abdomen during menstruation, but at other body sites and at other times in the cycle, and brain imaging studies show altered activity in pain processing regions of the brain. This explains something many people find upsetting: why investigations such as laparoscopy sometimes find nothing unusual, yet the pain remains very real. The pain reflects a hypersensitive pain system that is reinforced and maintained by stress, anxiety, and poor sleep, all of which further lower the threshold at which pain is felt.
What does this mean for treatment?
Understanding primary dysmenorrhea as a pain system condition and not just a pelvic condition opens up a broader range of approaches for treatment and relief, including:
Anti-inflammatory medication and hormonal therapy such as contraceptives, which address the prostaglandin-driven component of pain and are effective first-line treatments.
Movement and exercise, which has a well-established pain-relieving effect on the nervous system and has been shown to reduce period pain severity.
Addressing stress and anxiety through behavioural interventions and management strategies, because the nervous system's stress response is a real and modifiable contributor to pain severity.
Improving sleep, which supports the body's own pain control systems and helps break the pain-sleep cycle.
Pain science education, which helps people understand what is happening in their pain system, reducing fear, improving coping, and contributing to reduced pain amplification over time. Pain science education can be delivered by a pelvic floor physiotherapist as part of treatment, alongside other approaches.
Pelvic floor physiotherapy, which addresses pelvic floor tension and guarding, which is a protective muscle response that often develops alongside persistent menstrual pain and can itself become a source of ongoing discomfort. A pelvic floor physiotherapist can assess and treat this tension, while also incorporating nervous system approaches, pain science education and exercise prescription as part of a personalised treatment plan.
Complementary approaches which may provide relief including acupuncture, the use of heat packs, or the use of a TENS machine (transcutaneous electrical nerve stimulation).
Taking your pain seriously
Painful periods or primary dysmenorrhea is very common, real, and frequently undertreated. Pain can go beyond what prostaglandins or investigations alone can explain and effective treatments are available. If your period pain is affecting your wellbeing, speak with your GP or pelvic floor physiotherapist.
References
Society of Obstetricians and Gynaecologists of Canada (SOGC). Guideline No. 345: Primary Dysmenorrhea. Journal of Obstetrics and Gynaecology Canada. 2025. https://doi.org/10.1016/j.jogc.2025.102840
Abdulkhaliq MS, et al. The Impact of Stress and Anxiety on Dysmenorrhea Severity: A systematic review. Saudi Medical Horizons Journal. 2025. https://www.smh-j.com/smhj/article/view/185
Corrêa JB, et al. Correlation between primary dysmenorrhea and sleep quality in young nulliparous women. Brazilian Journal of Physical Therapy. 2024. https://doi.org/10.1016/j.bjpt.2024.101090
Pamuk GE, et al. Experimental and procedural pain responses in primary dysmenorrhea: a systematic review. Journal of Pain Research. 2017. https://pmc.ncbi.nlm.nih.gov/articles/PMC5604431/
