A member asked:

What to do if i always have diarrhea when i'm on my period and i don't know why?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Loose stools/menses: Cells in the uterus produce a chemical called prostaglandins. Prostaglandins stimulate smooth muscles in both the uterus and in some women they also stimulate the smooth muscle of the bowel. As the smooth muscles are stimulated in the uterus it allows the uterus to expel excess inner lining tissue. As smooth muscle in the intenstines are stimulated it propels feces rapidly through the colon.>.

Answered 3/11/2014

4.4k views

Thank

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