A person may experience a range of symptoms related to their period, such as cramps, nausea, headaches, and diarrhea.
This is usually nothing to worry about and can be a part of a person's typical menstrual cycle. Diarrhea during periods can happen due to increased prostaglandins in the body, which help with muscle contractions and blood vessel dilation.
However, having diarrhea during periods may also be a sign of endometriosis. People with endometriosis may notice gastric symptoms occurring at different points in the menstrual cycle, such as during menstrual bleeding.
If a person notices other symptoms of endometriosis, such as painful menstrual cramps, pain during sex, and difficulty getting pregnant, they should speak with a doctor.