What lumbar facet injection and epidural injection used for?and what is the defferent

Lumbar inj: Epidural steroid injections are typically focused at the nerve root (typically for pain that radiates or shoots down a limb), whereas the facet joint injection is focused at the facet joint, which supports the vertebral body connection and is away from the nerve root. Typically facet joint pain is exacerbated by lateral or forward/backward bending.

Facet inject vs ESI: Facet injections attempt to place medication into the joints of the spine called facets. These joints can cause neck/back pain when compressed by extending the back or neck. Epidural injections provide medication around the spinal nerves in order to relieve nerve pain--sciatica in the legs/radiculopathy in the neck/thoracic spine.

Different Areas: Facet injections are used for typical whiplash and arthritic pain that emanates from the facet joint in the spine which is in the back of spine. The epidural steroid injection can help with the same, however typically is used to treat the spinal nerve pain that is due to spinal stenosis or herniated disk that is pinching the exiting spinal nerve(s) which is in the front of spine area.