What causes foot numbness due to lumbar disc herniation?

Jun 29, 2022 Source: Cainiu Health
Disease description:

I feel numbness in my feet, and I have long suffered from cervical spondylosis, which causes me great concern. What is the mechanism by which lumbar disc herniation leads to foot numbness?

Doctor's answer (1)
Dr. Lin Yunfei
This symptom is typically caused by compression or trauma; therefore, patients should first treat the underlying condition to prevent further disease progression. After lumbar disc herniation occurs, intraspinal pressure in the lumbar region increases, compressing the lumbar nerve roots and leading to numbness, pain, and other symptoms in specific areas of the lower body on one side. The location of foot numbness varies depending on the site of lumbar disc herniation, but it is generally attributable to compression of the lumbar nerve roots.