Nerve Procedures
Diagnostic Facet Joint Blocks
A diagnostic facet joint block numbs the small nerves serving a specific spinal joint to answer one question: is this joint the source of your pain? Clear, temporary relief after the block points to that joint, giving your physician the confirmation needed before longer-lasting treatment such as radiofrequency ablation.
Request an AppointmentWhat is a Diagnostic
Facet Joint Block?
Imaging can show changes in the spine, but it can't always tell you which structure is actually sending the pain. A diagnostic facet joint block answers the question imaging can't.
The procedure injects a small amount of local anesthetic into or near the suspected painful joint; in some cases, a steroid medication is also used to reduce inflammation.
The main purpose is observation: if your typical pain improves for a short period after the joint is numbed, it suggests that joint is contributing to your symptoms. If it doesn't, your provider knows to look elsewhere. Either way, you leave with information.
A diagnostic block doesn't guarantee long-term relief on its own. What it provides is direction: a confirmed target for the treatments that follow, from therapy and medication management to radiofrequency ablation.
At Kentuckiana Pain Specialists, Dr. Nair uses this precise, medically guided approach to understand your pain before committing you to any treatment.
Relief confirms the joint; no relief rules it out. Both outcomes move your diagnosis forward.
The needle is guided to the exact joint under live X-ray, with medication injected only once position is confirmed.
When steroid medication is included, the block may reduce inflammation as well as diagnose.
A block that significantly reduces pain may qualify you for radiofrequency ablation: months of relief from the confirmed nerves.
Am I a candidate for a diagnostic facet joint block?
Before treating spine pain, we make sure we’re treating the right joint.
A diagnostic facet joint block may be considered if your symptoms suggest a facet joint is involved. Your provider may recommend it after reviewing your medical history, physical exam, imaging results, and previous treatment response.
Pain Lasting Weeks or Months
Pain that has persisted for several weeks or months without clear explanation or adequate improvement from conservative care.
Pain That Worsens With Spine Movement
Symptoms that worsen with bending, twisting, extending backward, or sustained postures like prolonged sitting or standing.
Localized Neck or Back Pain
Pain localized to the neck, mid-back, or lower back, rather than radiating strongly down the arms or legs.
Pain Not Explained by Imaging
X-rays or MRIs show changes but can't confirm the exact pain source. A block provides functional information imaging cannot.
Insufficient Response to Conservative Care
Physical therapy, medications, or other conservative treatments haven't provided enough relief.
Possible Arthritis or Joint Irritation
Facet joints irritated by arthritis, age-related wear, injury, or repetitive stress contributing to ongoing spine pain.
Common questions about diagnostic facet joint blocks
A facet joint block is an injection used to help determine whether a facet joint is causing or contributing to spine pain. It may include numbing medication and, in some cases, a steroid medication.
What is a facet joint block?
A facet joint block is an injection used to help determine whether a facet joint is causing or contributing to spine pain. It may include numbing medication and, in some cases, a steroid medication.
Ready when you are.
Get an Answer,
Not a Guess
If your spine pain has never had a confirmed source, a diagnostic facet joint block can find it, and point the way to the treatment that will actually work.
Prefer to talk? Call (502) 995-4004, answered 24/7.
Medically reviewed by Ajith Nair, M.D., Founder & Medical Director at Kentuckiana Pain Specialists. This page is for education and is not a substitute for a personalized medical consultation.
Last medically reviewed July 2026Updated