The difference between sciatica and lumbar disc herniation mainly lies in the different causes and clinical symptoms. 1. Different causes: sciatica is mostly due to sciatic nerve stimulation, compression, pulling caused by neuropathic pain. Common causes include: lumbar intervertebral disc herniation, pyriformis syndrome, etc. Lumbar intervertebral disc herniation is mainly due to degenerative lesions of lumbar intervertebral discs, resulting in fibrous ring fracture, and the nucleus pulposus protrudes to the back of the disease. 2. Clinical symptoms are different: sciatica is mainly manifested as pain and numbness along the sciatic nerve travel area, and severe atrophy of the buttock muscles may occur; while lumbar disc herniation, if it is mild, usually does not appear sciatica. When the nerve compression is severe, there can be radiating pain from the waist to the lower limbs, and even weakness and numbness of both lower limbs, and dysfunction of the bowels. Patients with related diseases are advised to seek timely medical treatment.