Period Pain: What Actually Works
A doctor explains which period pain remedies have real evidence, why timing matters more than dose, and the pain patterns that need proper investigation.
See a doctor promptly if
- Period pain that has become steadily worse over months, or pain that now lasts beyond your bleeding days
- Pain with pain during sex, difficulty getting pregnant, or pain when opening your bowels during your period
- Sudden severe one-sided pelvic pain, faintness, or pain with fever and abnormal discharge. This needs urgent assessment
The short version
- Anti-inflammatory painkillers from the NSAID group have the strongest evidence for period pain. They work far better when started at the first twinge than after the pain has set in.
- Local heat is not a folk remedy. In trials a heat pad on the lower abdomen works about as well as simple painkillers. You can use both together.
- Do not just put up with pain that stops you working. The same goes for pain that has changed, or that no longer settles with the usual steps. It deserves a proper look.
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For most people the two things with the best evidence are an anti-inflammatory painkiller from the NSAID group, taken at the very first twinge rather than once the pain has taken hold, and a heat pad or hot water bottle held against the lower abdomen. Those two together outperform almost everything else sold for cramps, and they can be used at the same time.
Why it hurts in the first place#
During a period the lining of the womb releases prostaglandins, which make the muscle of the womb contract so the lining can be shed. Strong contractions briefly squeeze the small blood vessels in the muscle wall, and muscle starved of blood hurts. The same mechanism, on a smaller scale, that makes a cramping calf painful. People with higher prostaglandin levels get stronger contractions and more pain. That is why the difference between two women in the same family can be enormous.
That mechanism explains the timing rule. NSAIDs work by blocking prostaglandin production, not by removing prostaglandins already made. Starting them as the first ache appears, and continuing regularly through the worst day or two rather than chasing the pain, is the single biggest improvement most people can make without any new product.
What has evidence behind it#
| Approach | How good is the evidence | Worth knowing |
|---|---|---|
| NSAIDs | Strong | Best taken early. Not suitable for everyone, including some people with stomach, kidney or asthma problems |
| Paracetamol or acetaminophen | Moderate | Gentler on the stomach, generally less effective than NSAIDs for cramps |
| Local heat | Good | Comparable to simple painkillers in trials. Safe to combine |
| Hormonal contraception and hormonal coils | Strong | A recognized treatment, not just contraception |
| Regular exercise | Moderate | Reduces pain over months rather than on the day |
| TENS machines | Modest | Helps some people. Low risk to try |
What is oversold#
Supplements are where most money is wasted. Magnesium, vitamin B1 and ginger have small studies suggesting a modest benefit, but the trials are small and inconsistent, and none of them approach the effect of getting the basics right. Detox teas, seed cycling and cleanses have no supporting evidence at all. Cannabidiol products are widely marketed for cramps without trial data to justify the price.
When pain is telling you something else#
Pain that has been the same since your teens and settles with simple measures is usually primary dysmenorrhoea: painful periods with no underlying disease. Pain that started later in life, has been getting worse, lasts beyond your bleeding days, or comes with pain during sex or difficulty conceiving is a different situation and points towards conditions such as endometriosis, adenomyosis or fibroids.
Endometriosis in particular is still diagnosed years later than it should be, largely because severe period pain gets normalized. If your pain regularly costs you work or study days, say that sentence plainly to your doctor. It carries more weight than a score out of ten.
Where to take this next#
If your periods are also heavy, irregular or unpredictable, the pain is only one part of the picture, and the fuller guide to painful and irregular periods walks through what a doctor will check and what the treatment options actually involve.
Should this go to a doctor?
Three honest answers, a plain answer back.
For muscle aches and period pain
Heat works for cramps and sore muscles, without side effects. An electric pad beats a hot water bottle for steady, safe temperature.
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Common questions
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