Summary
What causes period pain?
Period pain is mainly caused by uterine contractions triggered by hormone-like chemicals called prostaglandins. Higher prostaglandin levels can lead to stronger cramps, reduced blood flow and more severe menstrual pain.
When is period pain considered abnormal?
Period pain may be abnormal if it becomes severe, worsens over time, disrupts daily life or occurs alongside heavy bleeding, irregular periods or pain outside menstruation. Conditions like endometriosis, fibroids and PCOS may be involved.
What helps relieve period cramps naturally?
Heat therapy, anti-inflammatory foods, omega-3 fatty acids, gentle exercise, yoga and adequate sleep may help reduce menstrual cramps naturally. Some studies also suggest fish oil and chamomile tea may support symptom relief.
Can PCOS cause painful periods?
Yes. PCOS can contribute to painful or heavy periods, especially when accompanied by irregular cycles, acne, excess facial hair, weight gain and fertility difficulties. Severe ongoing period pain should be assessed by a GP.
Many women experience period pain at some point in their lives. In medical terms, it's called dysmenorrhoea - though "menstrual cramps" is what most people type into Google at 2am while clutching a hot water bottle and questioning biology's design choices.
And while period pain is common, "common" doesn't necessarily mean "you should simply endure it while pretending to function normally". Symptoms can range from mild discomfort to severe, life-disrupting pain. In fact, around one in four women experience cramps intense enough to interfere with work, exercise, sleep or everyday life. (1)
Understanding what causes period pain - and when it may signal something more serious - is key to managing symptoms effectively and knowing when to seek medical advice.
Period Pain Symptoms: More Than Just Cramps
Most women recognise the classic symptom: a dull, throbbing or cramping pain in the lower abdomen, usually beginning around the start of a period. But menstrual pain rarely travels alone.
Other common symptoms include:
- Nausea
- Diarrhoea
- Vomiting
- Headaches
- Dizziness or lightheadedness
- Bloating
- Fatigue
- Lower back pain
- Pain radiating into the thighs
For many, symptoms begin shortly before bleeding starts and peak during the heaviest part of the period.
What Are the Two Main Types of Menstrual Pain?
Spasmodic Period Pain
This is the sharp, intense, wave-like cramping pain many women describe as "stabbing". Think: your uterus attempting interpretive dance with maximum enthusiasm.
Congestive Period Pain
A more constant, dull ache that lingers steadily in the pelvis and lower abdomen.
Symptoms can vary significantly from month to month. One cycle may pass with barely a whisper of discomfort; the next may feel like your uterus has declared war.
What Causes Period Pain?
The short answer: your uterus contracts to shed its lining.
The slightly more science-y answer: during menstruation, the muscular wall of the uterus tightens to help expel the endometrium - the lining built up during the cycle in preparation for a possible pregnancy.
If pregnancy doesn't occur, that lining exits the body through the vagina. Efficient? Yes. Comfortable? Absolutely not.
The Role of Blood Flow and Oxygen
Strong uterine contractions can temporarily compress nearby blood vessels, briefly reducing blood flow and oxygen supply to the tissue. (2)
When oxygen levels drop, the uterus releases pain-triggering chemicals. Essentially, your uterus becomes temporarily under-fuelled and complains loudly about it.
What Are Prostaglandins?
Prostaglandins are hormone-like chemicals involved in inflammation and muscle contraction. (2) During menstruation, they encourage the uterus to contract.
Unfortunately, higher prostaglandin levels usually mean stronger contractions - and stronger contractions often mean more pain.
This also explains why cramps are often worst at the start of a period: prostaglandin levels are highest then and decrease as menstruation continues.
What Is the Difference Between Primary and Secondary Dysmenorrhoea?
Primary Dysmenorrhoea
Primary dysmenorrhoea refers to period pain caused mainly by prostaglandins and uterine contractions. (3)
It's the most common form of menstrual pain and often begins during the teenage years or early 20s. Symptoms may improve with age or after pregnancy.
Secondary Dysmenorrhoea
Secondary dysmenorrhoea occurs when an underlying medical condition contributes to period pain.
This type is more common in women over 30 and often:
- Starts earlier in the menstrual cycle
- Lasts longer
- Feels progressively worse over time
If your cramps suddenly intensify, stop responding to pain relief or consistently disrupt daily life, it's worth speaking to a GP.
What Conditions Are Linked to Severe Period Pain?
Endometriosis
In endometriosis, tissue similar to the uterine lining grows outside the uterus, often on pelvic organs. These cells still respond to hormonal changes, which can trigger significant pain during menstruation.
Symptoms are sometimes mistaken for PCOS because both conditions can involve pelvic pain and fertility challenges.
Fibroids
Fibroids are non-cancerous growths that develop in or around the uterus and can contribute to heavy, painful periods.
Pelvic Inflammatory Disease (PID)
PID is a bacterial infection affecting the reproductive organs and can cause inflammation, pelvic pain and painful periods.
Adenomyosis
Adenomyosis occurs when endometrial tissue grows into the muscular wall of the uterus, often leading to severe cramping and heavy bleeding.
Other potential causes of secondary dysmenorrhoea include:
- Ovarian cysts
- Endometrial polyps
- Sexually transmitted infections (STIs)
- Intrauterine contraceptive devices (IUDs)
- Polycystic ovary syndrome (PCOS)
Could Your Period Pain Be PCOS?
Painful periods combined with heavy bleeding and clotting can sometimes occur alongside PCOS.
Other common PCOS symptoms include:
- Irregular periods
- Fertility difficulties
- Excess facial or body hair
- Acne
- Oily skin
- Weight gain
If severe cramps appear alongside these symptoms, it's important to speak with a healthcare professional to rule out underlying conditions.
How to Relieve Period Pain Naturally and Medically
The good news: period pain is treatable, and management strategies range from medication to lifestyle interventions backed by emerging evidence.
Anti-Inflammatory Pain Relief
Over-the-counter anti-inflammatory medications such as ibuprofen may help reduce prostaglandin production and ease cramping.
Paracetamol can also help, though evidence suggests it may be less effective for menstrual pain than anti-inflammatory options. (2)
If symptoms remain severe, a GP may prescribe stronger medication or discuss hormonal contraception options.
Can the Pill Help with Period Pain?
Hormonal contraceptives - including the combined pill and hormonal IUS (coil) - may reduce period pain by thinning the uterine lining and lowering prostaglandin production.
An added bonus: lighter periods and fewer monthly dramas.
Natural Remedies for Period Pain
Nutrition and Anti-Inflammatory Foods
Diet may influence inflammation levels and menstrual symptoms.
Some evidence suggests reducing highly inflammatory foods - including excess sugar, alcohol and processed foods - may help. Increasing intake of omega-3 fatty acids from oily fish may also support symptom relief. (4)
Fish oil has even shown potential benefits comparable to ibuprofen in some cases of primary dysmenorrhoea. (4)
Chamomile tea may help too, thanks to glycine, an amino acid linked with muscle relaxation. (5)
Heat Therapy
A hot water bottle, heat patch or warm bath can relax muscles and improve circulation. Sometimes the classics survive because they genuinely work.
Yoga and Gentle Exercise
Exercise improves blood flow and releases endorphins, the body's natural painkillers.
Yoga may be particularly helpful for pelvic circulation and muscle relaxation. Exercise, even a gentle walk, helps promote 'happy' hormones such as serotonin and endorphins which are helpful in managing discomfort.
When to See a Doctor About Period Pain
Occasional cramps are common. Severe, worsening or persistent pain is not something you should ignore.
Speak with a GP if:
- Pain regularly disrupts daily life
- Symptoms worsen over time
- Over-the-counter medication stops helping
- You experience unusually heavy bleeding
- Periods become irregular
- Pain occurs outside menstruation
Your uterus may be hardworking, but it shouldn't behave like it's auditioning for an action film every month.
Key Takeaways
- Period pain is common, but severe or worsening cramps may signal underlying conditions such as endometriosis, fibroids or PCOS - especially when symptoms disrupt daily life or occur alongside heavy bleeding and irregular periods.
- Menstrual cramps are largely driven by prostaglandins, hormone-like chemicals that trigger uterine contractions, inflammation and temporary reductions in oxygen-rich blood flow to the uterus.
- Evidence-based relief strategies include anti-inflammatory painkillers, heat therapy, omega-3 rich foods, hormonal contraception, exercise and yoga - proving your hot water bottle may actually be participating in legitimate science.
Disclaimer: This article offers informational advice and is not a substitute for professional medical care. While we strive for accuracy and up-to-date information, always consult your GP or healthcare professional before using supplements or alternative products, especially if you have existing medical conditions or are under medical supervision.
References:
- Grandi, G., et al. Prevalence of menstrual pain in young women: what is dysmenorrhoea? J Pain Res. (2012). 5: 169-174. Available online: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3392715
- NHS. Period Pain. NHS. (2016). Available online: https://www.nhs.uk/conditions/period-pain
- Harding, M., et al. Period Pain: Dysmenorrhoea. (2018). Available online: https://patient.info/health/periods-and-period-problems/period-pain-dysmenorrhoea
- Zafari, M., Behmanesh, F., Mohammadi, A.A. Comparison of the effect of fish oil and ibuprofen on treatment of severe pain in primary dysmenorrhea. Caspian J Intern Med. (2011). 2(3): 279-282. Available online: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3770499
- Tea off to good health. Imperial College London. Available online: https://www.sciencedaily.com/releases/2005/01/050104112140.htm