What is the reason for abdominal pain and diarrhea during menstruation?

Patient's question:

Duration of onset and persistence of this illness: 2 menstrual cycles
Medical history: None

Doctor's answer:

Your condition is likely related to premenstrual syndrome (PMS). Due to the sudden decrease in sex hormones in the body before menstruation, it can affect the entire system and cause certain reactions. These reactions typically appear 7–14 days before menstruation, intensify 2–3 days before the onset of menstruation, and gradually subside and disappear after menstruation. In medicine, these more pronounced changes are referred to as premenstrual tension syndrome. It is recommended: Avoid unnecessary mental stress in daily life, reduce salt intake in your diet, maintain a regular lifestyle, and participate more in cultural and sports activities, which can significantly alleviate or even eliminate symptoms. For those with more severe symptoms, under the guidance of a doctor, medications such as phenobarbital (a sedative), progesterone, or androgens may be prescribed for treatment.