Female patients often have swelling and pain in the lower back, consider the local tissue gap pressure is too high, the nerves are stretched to produce swelling and pain symptoms, the common causes include the following aspects: a. lumbar muscle strain, women take too much work or housework, lumbar injury and strain, the local will produce congestion, edema, inflammatory reaction, tissue gap pressure will also increase, the fascia or local tissue nerves are stretched by the tension, produce swelling and pain symptoms. The symptoms of swelling and pain will occur. Second, the anatomical characteristics of women can lead to pelvic infection and inflammatory irritation, resulting in an increase in local tissue interstitial pressure, which reflexively causes swelling and pain in the lumbar region. Patients can check the lumbar region and pelvic cavity for a clear diagnosis, which requires imaging and ultrasound for preliminary judgment.