The common causes of left-sided back pain in women are the following: first, joint injury to the psoas and abdominal muscles, joint injury to the psoas and abdominal muscles caused by women during exercise or labor, or joint strain of the psoas and abdominal muscles caused by sports exercise, such as yoga, accidents such as car accidents or injuries caused by falling from a height, which can easily lead to the appearance of The left side of the back pain. Secondly, the anatomical characteristics of the pelvic inflammatory disease can easily lead to the emergence of pelvic inflammatory disease can also stimulate the production of pain in the front and back of the waist. Ovarian cysts and ectopic pregnancy in women may also cause anterior and posterior lumbar pain. Urinary stones and urinary tract infections can also cause symptoms. It is recommended that female patients go to the hospital for timely examination, including ultrasound and X-ray for a clear diagnosis.