People think period is just blood and mess, you’re in for a treat. Period diarrhoea is one of those rude biological side quests no one warns you about. During your period, your body releases prostaglandins to help the uterus contract and shed its lining. These chemicals are not great at staying in their lane. They also stimulate the smooth muscles of the intestines, speeding up gut movement. Faster gut movement means less water is absorbed from stool, which results in loose stools or full blown diarrhoea. A few things that make it worse : Higher prostaglandin levels means stronger cramps and more bowel stimulation Hormonal shifts, especially the drop in progesterone just before your period, remove progesterone’s usual “constipating” effect. Increased gut sensitivity during menstruation can amplify symptoms, especially if you already have IBS. Inflammation and pain responses can activate the gut brain connection and push things along even faster. This is normal, common, and unfortunately under discussed. If it is severe, persistent beyond your period, associated with blood in stool, fever, or weight loss, that is not “just periods” and should be checked. Otherwise, welcome to the monthly reminder that the uterus and intestines share a wall and zero respect for personal boundaries.
