Overview
Understanding facet joint injections and medial branch blocks
Facet joints guide movement and provide stability between spinal bones. Arthritic or irritated facets can contribute to localized neck or back pain, but symptoms and imaging alone may not prove that a facet joint is the source.
A medial branch block places a small amount of anesthetic near the nerves that supply a facet joint. The timing and degree of response can help guide whether another treatment, such as radiofrequency ablation, should be discussed.
Useful context
When this may be discussed
- Selected neck or low-back pain thought to arise from facet joints
- Clarifying whether medial branch nerves carry the pain signal
- Planning the next step after examination, imaging review, and earlier care
At the clinic
What the process may involve
- 01
Review of the pain pattern, medications, infection risk, and prior treatment
- 02
Positioning, monitoring, skin preparation, and local anesthetic
- 03
Image-guided needle placement at the selected joint or medial branch nerve
- 04
A structured plan for tracking short-term pain and function after the block
Benefits, limits, and risks
Questions to discuss before treatment
- A temporary response does not guarantee that a later treatment will help.
- Possible risks include bleeding, infection, medication reaction, temporary numbness or weakness, increased pain, and injury to nearby tissue or nerves.
- A diagnostic block tests a hypothesis; it does not repair arthritis or prove that every symptom comes from the facet joint.
References
Sources and further reading
These references provide general education. They do not replace advice from a clinician who knows your health history.