Women may experience a range of symptoms before and during their period.
Diarrhea, abdominal pain, and other gastrointestinal issues are common symptoms of menstruation.
Some people may experience diarrhea during or before their period.
This is likely due to an increase in the production of prostaglandins in the body. Prostaglandins are hormone-like chemicals that assist certain functions in the body, including: muscle contractions; blood vessel dilation and constriction and blood clotting.
Before a period starts, cells in the lining of the uterus increase production of prostaglandins. This increase in prostaglandins causes the uterus muscles to contract, thereby releasing the lining of the uterus.
What causes diarrhea during a period?
When prostaglandin levels are high, some prostaglandins may enter the bloodstream. They can then travel to various parts of the body, including the bowels.
The bowels have a smooth lining of muscle, similar to the uterus. High levels of prostaglandins can cause the bowels to contract and release their contents, resulting in diarrhea.
Excess prostaglandins can also cause other period-related symptoms, including headaches, nausea and vomiting.
Apart from causing pain and discomfort, excessive amounts of prostaglandins do not cause any health risks.
Source:
https://www.medicalnewstoday.com/articles/diarrhea-during-period#causes
