Low back pain causing anterior thigh pain is usually caused by lumbar disc herniation, when the lumbar disc herniation is a high segment lumbar disc herniation, often lumbar 2-3 segment and lumbar 3-4 segment lumbar disc herniation, this can compress the nerve roots, leading to pain and numbness of the skin on the anterior side of the thigh, and can also lead to diaphoresis, it is necessary to check the CT and MRI of the lumbar spine at an early stage to determine the diagnosis and early treatment. If the condition is not severe, conservative treatment can be considered, requiring bed rest as well as physical therapy and oral medication. If the condition does not improve after two or more months of treatment, consider surgery, which can remove the herniated disc and provide relief for most patients.