Why do I get diarrhea during my period?

Menstruation is an inevitable physiological phenomenon in women’s natural hormonal regulation process. Regular, smooth menstruation forms the foundation of physical health; through the expulsion of menstrual blood, the body’s internal balance can be improved and regulated. However, individual experiences of menstruation vary widely—some women pass through it effortlessly, while others suffer significantly. Some even notice that they develop diarrhea whenever their period begins. So, what causes diarrhea during menstruation? Below, we address this question.

What Causes Diarrhea During Menstruation?

1. Hormonal Imbalance

During menstruation, hormonal fluctuations occur—particularly an increase in estrogen levels. Additionally, unhealthy lifestyle habits such as chronic sleep deprivation may disrupt endocrine function, thereby irritating the gastrointestinal tract and triggering diarrhea. Women are generally more physically vulnerable during their periods; thus, it is essential to relax and avoid excessive mental or physical stress.

2. Abdominal Cold Exposure

Many women neglect proper abdominal warmth in daily life, making them susceptible to cold invasion. During menstruation, poor dietary discipline—such as consuming whatever one craves without regard for food properties—can exacerbate this issue. In particular, ingestion of cold or cooling foods may directly irritate the intestines, leading to diarrhea during the menstrual period.

3. Deficiency of Qi and Blood

Menstruation involves the expulsion of “stagnant” or “old” blood from the body. Women with pre-existing deficiencies in qi and blood may experience further depletion due to menstrual blood loss, resulting in pronounced weakness. When qi and blood are insufficient, intestinal absorption and digestive functions become impaired—potentially manifesting as diarrhea.

4. Gynecological Disorders

The female reproductive anatomy is inherently complex, rendering women prone to gynecological issues—often stemming from personal hygiene practices or other factors. Such conditions may trigger diarrhea. If uterine pathology is present, it may secondarily affect gastrointestinal function via neuroendocrine pathways. Consequently, affected individuals may experience not only abdominal pain but also frequent diarrhea during menstruation.

The above outlines the primary reasons why some women experience diarrhea during menstruation. We hope this information proves helpful.