If it is in the pre-menstrual period of back pain, stomach pain, it may be to menstruation, because before menstruation pelvic cavity will be in a state of congestion, relatively some women are more sensitive, there will be lower abdominal discomfort, lumbosacral discomfort, appropriate rest will alleviate this symptom. If the symptoms of lumbar pain and stomach pain are relatively obvious, accompanied by increased vaginal discharge, yellow color, odor or burning sensation in the vaginal area, it is usually due to pelvic inflammation, mainly because the pelvic cavity will be in a congested and edematous state when there is inflammation, and before menstruation will aggravate the edematous and congested state, so lumbar-sacral pain and stomach pain will occur, and the gynecological examination can be Clearly diagnosed. If it is inflammation, actively give anti-inflammatory treatment.