Lumbar pain in girls may be caused by lumbar disc herniation, lumbar muscle strain, chronic pelvic inflammatory disease and other factors. 1. Herniated lumbar intervertebral disc: the herniated intervertebral disc will compress the nerves, which will cause the symptoms of lumbar pain, accompanied by radiating pain in the lower limbs, numbness of the lower limbs and other symptoms, which will seriously affect the daily walking. 2. Lumbar muscle strain: prolonged excessive bending or lumbar cold may lead to chronic strain of the lumbar muscles, which will cause lumbago. The symptoms of low back pain can also be significantly aggravated when you are cold or overworked. 3. Chronic Pelvic Inflammatory Disease: When a woman has chronic pelvic inflammatory disease, it can also cause symptoms of back pain, which may be accompanied by low-grade fever, increased vaginal discharge, lower abdominal mass, and a feeling of falling. There are many other causes of low back pain in women. When a woman has symptoms of low back pain, she should pay attention to it, and it is recommended that she consult a doctor in time for a detailed examination, a clear diagnosis, and timely treatment under the guidance of the doctor.