Medial branch blocks (MBBs) are a minimally invasive diagnostic procedure used to determine the source of pain in the neck, mid-back, or low back caused by facet joint problems. Facet joints are small joints located between the vertebrae of the spine that help provide stability and allow movement.

During an MBB procedure, a local anesthetic (numbing medication) is injected near the medial branch nerves that transmit pain signals from the facet joint to the brain. If the pain is relieved after the injection, it confirms that the facet joint is the source of the pain.

MBBs are typically used to diagnose and treat conditions such as facet joint arthritis, degenerative disc disease, spinal stenosis, and other spine-related pain conditions. They are usually performed as part of a comprehensive treatment plan that may include physical therapy, medication management, and other interventions.

MBBs are typically considered safe, with only minor risks such as infection or bleeding at the injection site. They may not be appropriate for patients who are pregnant, have an active infection, or have a bleeding disorder. It is important to discuss any potential risks with your healthcare provider before undergoing an MBB.