Why do we feel so bad during period? what causes physical discomfort (cramps, bloating, bowel changes?)

Hormone fluctuations: A doctor can check to see if there is a medical issue, if a woman has mild menstrual-related symptoms. Many women have some variation of mucus discharge, of periods, or a missed period on occasion. Some women feel normal after a few days but others have bothersome symptoms and follow-up with a doctor. Hormone fluctuations can lead to some inflammation (with cramping) as the uterine lining is shed.