Menstrual period may also appear back pain, back pain symptoms, the main reasons for the following aspects: First, may belong to the menstrual syndrome, many women during the menstrual period due to pelvic bruising, resulting in excessive blood flow, and therefore will stimulate the lower abdomen, appearing back pain and other various situations, may also be due to the body prostaglandin secretion stimulation of the body, which is a normal physiological response. Second, it may also be due to the usual inattention to body warmth, uterine cold and other problems caused, if the cold invasion will directly affect the health of the body, appearing various symptoms such as lumbar discomfort. Third, can not completely rule out various orthopedic diseases, such as lumbar spondylosis, lumbar disc protrusion and other various diseases, can lead to the appearance of low back pain and other situations, if the pain is more powerful and can not walk, it is recommended to promptly go to the hospital for examination to determine the type of disease.