Due to individual differences, the symptoms before menstruation are different for each woman. Some people will have stomach pain, mainly because the pelvic cavity is in a state of congestion before menstruation, plus women are more sensitive to this congested state, so they will have stomach pain, some people show bloating pain, others show cramping pain. This is because the pelvic cavity itself has chronic inflammation. Chronic inflammation causes congestion and edema in the pelvic tissues, and this congestion and edema often worsens before menstruation, so stomach pain can also occur, and this pain often worsens when menstruation comes. Therefore, it is recommended that clinical examination should be given to rule out pelvic inflammatory disease when stomach pain occurs before menstruation, and if there is pelvic inflammatory disease, it is recommended that active treatment be given.