Symptoms of abdominal cramps and lower back pain during menstruation suggest that you may be suffering from dysmenorrhea, or you may be suffering from inflammatory gynecological diseases or oncological diseases. Endometritis is the most common cause of abdominal cramps and lumbar pain during menstruation, which is often accompanied by abnormal vaginal discharge, and in severe cases, may be accompanied by systemic symptoms such as fever and loss of appetite; when suffering from chronic inflammatory diseases of the cervix, abdominal cramps and lumbar pain during menstruation may also occur. Usually suffer from uterine fibroids, ovarian cysts and other gynecological oncological diseases, pelvic congestion during menstruation will also cause this symptom. In some women, sexual stimulation during menstruation leads to congestion and edema of the tissues in the pelvic cavity, causing significant lower abdominal and lumbar floor distension and discomfort after the onset of menstruation. The possible causes are not the same in different individuals, and patients should visit the hospital for proper examination and diagnosis.