Period poop: understanding bowel changes during your period.

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POV: You're a few hours into your period and suddenly... nature calls. Intensely. If you've ever wondered why your bowels seem to take a wild turn the moment your period arrives, you're not alone. 'Period poop' is real, it's normal, and there's a perfectly hormonal reason behind it.


From menstrual diarrhoea to the other extreme of feeling totally backed up, your gut has a starring role in your menstrual cycle - and most of us just haven't been told much about it. Let's change that.

 

WHAT IS PERIOD POOP?

'Period poop' is the not-so-glamorous term for the bowel changes a lot of women and menstruating people experience right before, during, or just after their period. For some, that means looser-than-usual stools (also known as menstrual diarrhoea); others find themselves dealing with constipation when menstruating. Plenty of us flip between both.

So what is a period poop, exactly? It's the result of hormonal shifts (think prostaglandins and progesterone) doing a tap dance on your digestive system. Menstruation poop changes are super common, often start a day or two before your bleed, and usually settle once your period winds down. You're not weird - you're just hormonal.

 

WHY DOES YOUR POOP CHANGE DURING YOUR PERIOD?

The short answer? Hormones - prostaglandins and progesterone, specifically. Both rise and fall as you move through the four phases of your menstrual cycle, and both have a knack for messing with your bowels in opposite ways.

Prostaglandins are hormone-like substances released by your uterus to help it contract and shed its lining. The catch? They don't always stay in their lane. When prostaglandin levels are high, they can trigger contractions in your bowel too - speeding everything up.

Progesterone, on the other hand, peaks in the luteal phase (the week or so before your period) and tends to slow your digestion right down - hello bloating and that backed-up feeling.

TL;DR Your hormones are calling the shots, and your gut is along for the ride.

 

MENSTRUAL DIARRHOEA: WHY IT HAPPENS & HOW TO MANAGE IT

Menstrual diarrhoea is one of the most common period poop experiences, and it's down to those prostaglandins. When they're released to help your uterus contract, they can tell your bowel to contract too - leading to faster transit and looser stools.

Wondering why do I get diarrhoea on my period? Higher prostaglandin levels are usually the culprit. Diarrhoea while on period tends to peak in the first day or two of your bleed, and eases as your hormones settle.

A few lifestyle factors can crank up the intensity:

  • Caffeine, which already stimulates the bowel
  • Anxiety or stress
  • Spicy, fatty or super-rich foods
  • Alcohol

To manage it, sip plenty of water, go easy on caffeine and rich foods, and stick to gentle, fibre-balanced meals. Ginger or peppermint tea can help calm things down. If symptoms are severe or paired with intense pain, fever or blood in your stool, see your GP.

 

PERIOD CONSTIPATION: WHY YOU MIGHT FEEL BLOCKED UP

Some Moxettes go the other way and find themselves dealing with period constipation, often in the lead-up to their bleed.

Why do I get constipated on my period? Blame progesterone. In the luteal phase, progesterone rises to prepare your body for potential pregnancy - and it relaxes smooth muscles, including those that move food through your digestive tract. The result? Slower digestion, harder stools, and that 'I haven't gone in days' feeling.

Constipation when menstruating can also be made worse by:

  • Lower water intake
  • Less movement (because period fatigue is real)
  • Comfort eating refined carbs and processed foods
  • Iron supplements

To get things moving, stay hydrated, add fibre-rich foods like leafy greens, oats and chia, and squeeze in some gentle movement. If it hangs around for weeks or worsens, check in with your doctor.

 

WHY DOES IT HURT TO POOP ON YOUR PERIOD?

If you've experienced stabbing pain when pooping during period (or wondered why does it hurt to poop on my period), you're not the only one. Painful poops can range from mild discomfort to sharp pains.

During your period, your uterus is contracting to shed its lining. Because your uterus sits right next to your bowel, those contractions (and the prostaglandins driving them) can refer pain into your rectum and lower abdomen. Translation: your bowel is feeling your uterus's mood.

Pelvic congestion, bloating, and a fuller-than-usual bowel can also make things uncomfortable. If you're constipated, harder stools and straining can intensify the pain too.

In some cases though, severe pain when pooping on your period can be a sign of something more - like endometriosis. Endo can grow on or near the bowel and become inflamed during menstruation. If your pain is intense, getting worse, or paired with bleeding from the rectum, book in with your GP. You deserve answers.

 

HOW PERIOD POOP CAN AFFECT YOUR MOOD AND ENERGY

Your gut and your brain are in constant conversation thanks to the gut-brain axis - which means digestive issues during your period can flow on to how you feel mentally and emotionally too.

When menstrual diarrhoea, bloating or cramps hit alongside PMS or period fatigue, it's a recipe for feeling drained, irritable or just plain meh. Be kind to yourself, and don't underestimate the power of a hot water bottle, hydration, and an early night.

 

WHAT HELPS WITH PERIOD POOP? RELIEF TIPS FOR MENSTRUAL DIARRHOEA AND CONSTIPATION

LIFESTYLE AND MOVEMENT

Movement is medicine, especially during your period. Gentle exercise like walking, yoga or stretching can stimulate digestion (great for constipation) and ease cramping (great for diarrhoea). Heat therapy - hot water bottles or a warm bath - can also relax your pelvic muscles. Don't skip the basics: hydrate, sleep, and tune in to your body.


FOODS TO EAT AND AVOID

For relief from menstrual diarrhoea: stick to gentle, easy-to-digest foods (rice, bananas, oats, soup) and skip caffeine, alcohol, and spicy or fatty foods.

To manage period-related constipation: load up on fibre (leafy greens, chia, berries, wholegrains), drink plenty of water, and consider a daily probiotic.


WHEN TO SEEK MEDICAL ADVICE

Book in with your doctor if you're experiencing:

  • Severe or stabbing pain when pooping during your period
  • Diarrhoea or constipation that lasts more than a few days
  • Blood in your stool (not from your period)
  • Symptoms that interfere with daily life

These can sometimes point to conditions like endometriosis or irritable bowel syndrome (IBS) - and getting on top of them early makes a real difference.

 

FINAL THOUGHTS: PERIOD POOP IS NORMAL - BUT THERE IS HELP IF YOU NEED IT

Period poop is one of those things no one really warns you about - but it's a normal part of having a cycle. Whether you're dealing with menstrual diarrhoea, constipation when menstruating, or a confusing combo of both, your hormones are doing exactly what they're built to do.

Tracking your symptoms, supporting your body with good food, hydration and movement, and making an appointment to see your doctor when something feels off are all forms of self-care. You're not gross, you're not weird, and you're definitely not the only one experiencing it.

 

The information provided here is intended to educate and inform only, and does not constitute, nor should it replace, a personalised medical diagnosis from your doctor. If you're ever unsure about anything to do with your menstrual or digestive health, please check in with a trusted health practitioner.

Your body, your rules, your guide (delivered).

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