It is very common to poop more during your period. This happens because your body releases substances called prostaglandins to help the uterus contract and shed its lining. Those same substances also stimulate the intestines, which can lead to more frequent bowel movements and looser stools.
These bowel changes tend to be strongest at the start of your period, especially on the first day. Research shows that a large majority of people who menstruate notice some digestive change at this time, including diarrhea, cramping, or urgency. The drop in progesterone right before bleeding starts can also remove a natural slowing effect on the gut, making things move faster than usual.
For most people, this is a normal cycle-related response and not a sign of a digestive problem. Symptoms usually improve as the period progresses and hormone levels stabilize. Stress and period pain can make bowel symptoms feel more intense, even when nothing serious is going on.
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If bowel changes are severe, last beyond your period, or interfere with daily life, it is important to talk with a gynecologist or primary care doctor. Avoid self-medicating without guidance, especially with pain relievers or anti-diarrheal drugs, as they may not be appropriate for everyone.