# Period pain in perimenopause: why cramps change · Peri Signals > Source: https://perisignals.com/articles/period-cramps-perimenopause Periods and bleeding ## Period pain in perimenopause Cramps can get worse in your 40s, or turn up between periods, because perimenopause hormones swing harder and ovulation comes at odd times. Pain that grows month after month, starts days before a period or stays after it is also how fibroids and adenomyosis show up, so the NHS says to see a GP when periods become more painful. By Nora Whitfield, updated 3 November 2026 ### Why period cramps can get worse in your 40s Ordinary period pain comes from chemicals called prostaglandins, made in the lining of the womb. The [American College of Obstetricians and Gynecologists (ACOG)](https://www.acog.org/womens-health/faqs/dysmenorrhea-painful-periods) explains that they make the muscle of the womb contract, that their level is highest on the first day of bleeding, and that it falls as the lining is shed. That is why cramps usually ease after a day or two. Perimenopause changes the hormones that set this up. In a regular cycle, estrogen falls after ovulation. A women's health specialist quoted by [Cleveland Clinic](https://health.clevelandclinic.org/cramps-during-perimenopause/) explains that in perimenopause estrogen can stay high after ovulation instead, and that high estrogen can make the body release more prostaglandins. The same article says hormone swings can make familiar period symptoms worse and bring new ones, so someone who never had bad cramps can start having them in their 40s. There is a catch in that explanation. ACOG notes that the common, lifelong kind of period pain (primary dysmenorrhea) often becomes less painful with age. So when cramps get worse after 40, hormones are a likely reason but not the only one, and the conditions in the next sections are what a doctor will want to rule out. ### Cramps but no period Cramping with no bleeding after it is one of the more confusing perimenopause signs. Cleveland Clinic puts it down to irregular ovulation: once your cycle stops following its old monthly pattern, you can feel cramps that no period follows, and some people describe it as "ovary pain". If your cycles have stretched out, a run of cramps can also be a period that is late rather than missing. Our guide to [irregular periods in perimenopause](/articles/irregular-periods-perimenopause) explains the longer and shorter cycles that blur this. Two other explanations matter more. Cleveland Clinic lists a hormonal coil, a past endometrial ablation or a hysterectomy as reasons you can have cramps without bleeding, which makes the pain itself the only signal to go on. And pregnancy is still possible in perimenopause. The [NHS](https://www.nhs.uk/symptoms/ovulation-pain/) says to ask for an urgent GP appointment or call 111 if you have tummy pain and think you may be pregnant, because an ectopic pregnancy can cause it. Our article on [pregnancy in perimenopause](/articles/can-you-get-pregnant-during-perimenopause) covers when to take a test. ### Ovulation pain in perimenopause Some cycles in your 40s still release an egg, and that can hurt. The NHS describes ovulation pain as a dull ache or sharp twinges on one side of the tummy, about 14 days before a period, lasting from a few minutes to a day or two, and often switching sides from month to month. A little bleeding or discharge can come with it. What changes in perimenopause is the timing. When cycles shorten or lengthen, "about 14 days before a period" is hard to place, so a one-sided twinge in an odd week may still be ovulation. The NHS lists conditions that can feel similar, including endometriosis, ovarian cysts, chlamydia and scar tissue from earlier surgery, and says tummy pain that keeps coming back should always be checked. ### Cramping and bleeding between periods If cramps come with spotting or bleeding in the middle of a cycle, mention both to your doctor in the same breath. Light bleeding can come with ovulation, and hormone swings can cause bleeding between periods as well. Even so, the NHS lists bleeding between periods on its period-pain page among the reasons to see a GP, and ACOG's page on [perimenopausal bleeding](https://www.acog.org/womens-health/faqs/perimenopausal-bleeding-and-bleeding-after-menopause) lists bleeding between periods as not normal at any stage. The causes overlap with the ones for pain: fibroids, polyps, infection and, less often, changes in the cervix or the womb lining. Our page on [spotting between periods in perimenopause](/articles/spotting-between-periods-perimenopause) goes through them, and the [perimenopause bleeding checker](/articles/is-this-bleeding-normal-a-perimenopause-bleeding-checker) sorts bleeding by how soon to get it seen. If cramps come with a period that arrives twice in a month, see [two periods in one month](/articles/two-periods-in-one-month). ### Fibroids, adenomyosis and other look-alikes ACOG separates period pain into two kinds. Secondary dysmenorrhea is caused by a problem in the reproductive organs, and it has a recognisable shape: it tends to get worse over time, it often lasts longer than normal cramps, it may begin a few days before a period and it may not go away when the period ends. That pattern is the main thing that sets it apart from hormone-driven cramps, and it is worth noticing because the conditions behind it are common at this age. * **Adenomyosis** happens when the womb lining grows into the muscle wall of the womb. The [NHS adenomyosis page](https://www.nhs.uk/conditions/adenomyosis/) says its symptoms usually affect women over 35, and lists painful periods that can stop you doing your usual things, heavy bleeding, and pelvic pain, bloating or pain with sex at any point in the cycle. It is more likely if you have given birth, and the NHS notes it can take a long time and several tests to diagnose. * **Fibroids** are non-cancerous growths in or around the womb. The [NHS fibroids page](https://www.nhs.uk/conditions/fibroids/) says they mainly affect women who have not reached menopause, and lists heavy or painful periods, stomach or lower back pain, peeing more often, bloating or trouble pooing, and pain during sex. Many cause no symptoms, and ACOG says small fibroids usually do not cause pain. * **Endometriosis** is womb-like tissue growing outside the womb, on the ovaries, tubes, bladder or behind the womb, which bleeds with each cycle and can leave scar tissue (ACOG). * **Pelvic inflammatory disease**, an infection of the womb, tubes and ovaries, is on the NHS list of causes of painful periods, as is a copper coil in its first 3 to 6 months. Adenomyosis and fibroids both make periods heavier as well as more painful, so cramps that arrive with flooding or clots belong in one conversation. Our article on [heavy periods and blood clots in perimenopause](/articles/heavy-periods-perimenopause) gives the measurable signs of a period that is too heavy. ### Perimenopause pelvic pain that is not period pain Not every ache low in the tummy comes from the womb. ACOG notes that bowel and bladder conditions such as Crohn's disease can flare around a period and feel like cramps. The NHS adenomyosis page says to see a GP if you have felt bloated for about three weeks. The [NHS ovarian cancer symptoms page](https://www.nhs.uk/conditions/ovarian-cancer/symptoms/) is the one to know at this age. It lists a swollen or bloated tummy, pain or tenderness between the hips, feeling full quickly or losing your appetite, and needing to pee urgently or more often, when they happen frequently, which it puts at roughly 12 or more times a month. It stresses that these symptoms are very common and usually have another cause, and that they are still worth getting checked, because cancer found early can be more treatable. ### Which period pain to report, and how soon The [NHS period pain page](https://www.nhs.uk/symptoms/period-pain/) sorts it into two groups. **Ask for an urgent GP appointment or call NHS 111** if your pelvic pain or period pain is severe or worse than usual and painkillers have not helped. The same applies to tummy pain when you think you could be pregnant. **Book a routine GP appointment** if: * your periods become more painful, heavier or irregular * period pain stops you doing your usual daily activities * you have pain during sex, or when peeing or pooing * you are bleeding between periods * you notice a change in how much you pee or poo * your tummy is swollen * you have lost your appetite, or are losing weight without trying Cleveland Clinic's specialist puts it more simply: any new or worsening cramping should be discussed with a doctor. ACOG says the same about painful periods in general. For many women in their 40s, the first bullet alone is reason enough to book. ### What happens at the appointment A GP will ask about your periods and may feel your tummy and offer an internal examination, according to the NHS, and you can ask for a female doctor or for someone to be in the room with you. The usual next test is an ultrasound scan, on the tummy or inside the vagina, which can show fibroids and how big they are. For adenomyosis the NHS adds an MRI scan. ACOG says a laparoscopy, a small camera passed through a cut near the belly button, is sometimes used to look for endometriosis. What happens after that depends on what is found, your age and whether you might want to become pregnant, and the options are your doctor's to talk through with you. Peri Signals does not give treatment advice. ### What to write down before you go Pain is hard to describe from memory, and the details that separate hormone-driven cramps from a look-alike are all about timing. For two or three cycles, I would note: * the first day of each period and how many days it lasts * the days you have cramps, and whether they start before bleeding or carry on after it * which side the pain is on, if one side, and whether it moves * how bad it is (mild, moderate or severe) and whether it stopped you doing something * any bleeding between periods, pain with sex, bloating or changes in peeing and pooing * any coil, contraception or hormone medicine, and when it started The [printable symptom diary](/articles/printable-perimenopause-symptom-diary-and-appointment-checklist) gives you rows for period days, flow and symptoms to fill in at home. For everything else that changes at this stage, see our guide to [perimenopause symptoms and how to track them](/articles/perimenopause-symptoms). ### My take I would judge period pain in your 40s by its direction rather than its strength on any one day. Cramps that flare for a cycle or two and settle again fit the hormone swings Cleveland Clinic describes. Cramps that get worse every few months, start days early, outlast the bleeding or come with heavier periods fit ACOG's description of secondary pain, and I'd book that appointment without waiting to see if it passes. Start the diary now, so you arrive with three cycles of dates. If the pain is severe and painkillers have not touched it, skip the diary and use the NHS urgent route the same day. ### Related reading Everything on cycle changes is under [periods and bleeding](/topics/periods-and-bleeding), and the other symptoms of this stage are under [symptoms, one by one](/topics/symptoms). Written by Last checked 2026-11-03 --- [Peri Signals](/) Perimenopause symptoms, explained and tracked Plain answers on perimenopause symptoms for women 35 to 65: what is common, what to tell your doctor, and how to keep a useful symptom record. Some links on this page may earn us a commission. It never decides what we write about or recommend. © 2026 Peri Signals. Independent and reader-supported.