What is Failed Back Surgery Syndrome, and why does pain persist after spine surgery?
Failed Back Surgery Syndrome (FBSS) is the term clinicians use when chronic pain continues — or newly develops — after one or more spinal surgeries. It is not a single condition but a descriptor for an unresolved outcome. The underlying disc pathology, particularly annular tears, is often the reason pain persists even after a technically successful operation.
Spine surgery often targets nerve compression — a herniated disc pressing on a nerve root, for example — without fully addressing the damaged disc tissue itself. When annular tears remain unsealed, inflammatory proteins continue to leak from the disc, irritating surrounding nerves long after the surgical wound has healed. Other contributing factors include epidural scar tissue (fibrosis) that forms around nerve roots post-operatively, recurrent disc herniation at the treated level, new disc pathology at an adjacent spinal level, and in some cases, a mismatch between the original pain source and the surgical target.
For a detailed clinical overview of causes and recovery pathways, see our guide: What Is Failed Back Surgery Syndrome? Causes, Symptoms, and Recovery Options.
How do I know if my ongoing pain qualifies as FBSS?
Persistent or new back, neck, or radiating leg pain lasting three or more months after spinal surgery is the clinical hallmark of FBSS. A spine specialist will review your surgical history, perform a physical examination, and order updated MRI imaging to identify what anatomical issues remain.
Common symptoms patients report include:
- Persistent aching, burning, or sharp pain at or near the original surgical site
- Radiating pain, numbness, or tingling into the legs or arms (depending on spinal level)
- Muscle weakness that was not fully resolved by surgery
- Difficulty returning to normal daily activities or work
A clinical evaluation is the only way to know for certain what is driving the pain. Imaging findings alone do not establish candidacy for any specific treatment.
Can biologic disc repair help patients who have already had spine surgery?
For patients whose pain stems from persistent annular tears or internal disc disruption — a common finding in FBSS — biologic disc repair is designed to address that root cause directly. Among outcome data tracking failed-surgery patients, 80% reported positive outcomes with intra-annular fibrin injection; individual outcomes vary and depend on each patient’s anatomy and clinical history.
The fibrin sealant used in the procedure is FDA-approved as a sealant. It is injected under imaging guidance through a thin catheter directly into the damaged disc, where it is intended to seal annular tears and support the disc’s natural healing environment. The procedure does not remove tissue, fuse vertebral segments, or require general anesthesia — a meaningful distinction for patients who have already been through major spine surgery.
For a closer look at how one post-fusion patient achieved significant pain reduction without revision surgery, see: 70% Pain Reduction with Fibrin Disc Repair: How a Post-Fusion Patient Achieved Mobility Without Revision Surgery.
Clinical Note
At Valor Spine, we see patients who have often been through a great deal before they reach us — surgery, recovery, hope, and then the slow return of pain. That experience is exhausting in ways that are hard to put into words. What we want those patients to understand is that a prior surgery does not close the door on further options. In many FBSS cases, the disc tears that were present before surgery are still present after it — unaddressed, still painful. The conversation we want to have with you is about whether those tears are still the source of your pain, and whether sealing them is a realistic next step for your situation. That starts with an honest evaluation, not a sales pitch.
How does intra-annular fibrin injection differ from revision surgery?
The fibrin procedure is a minimally invasive outpatient treatment — it is not a repeat surgery. Traditional revision surgeries for FBSS typically involve more hardware, more tissue disruption, longer recovery, and carry their own risk of contributing to additional failed outcomes. Back surgery carries a roughly 40% failure rate as reflected in the Failed Back Surgery Syndrome literature; each additional operation compounds that risk profile.
Key differences in the fibrin approach:
- No incisions. The catheter is introduced through a small-gauge needle under fluoroscopic guidance.
- Outpatient setting. The procedure is typically completed in under one hour, with local anesthesia and optional light sedation.
- Preserves spinal anatomy. No vertebrae are fused, no disc tissue is removed, and spinal mobility is maintained.
- Targets the disc directly. The fibrin sealant is delivered to the site of the annular tear, not to surrounding structures.
For guidance on evaluating all available options before deciding on a path, see: How to Evaluate Spine Repair Options After Surgery.
What happens before the fibrin procedure — and what is an annulogram?
The standard diagnostic step before intra-annular fibrin injection is an annulogram — an imaging-guided test in which contrast dye is injected into each disc to identify exactly where tears and leaks are present. Standard MRI identifies structural changes in discs but does not always reveal every active annular tear. The annulogram fills that gap, giving the clinical team a precise map of disc damage before any fibrin is placed.
This two-step process — annulogram followed by fibrin injection — ensures that the procedure addresses the actual sources of pain rather than treating on the basis of imaging inference alone. Patients should expect the annulogram to be part of their clinical workup.
Is the procedure well-tolerated by patients who already have chronic surgical pain?
The fibrin procedure is performed under local anesthesia at the procedural site, with optional light sedation. Most patients tolerate it without the level of discomfort associated with open surgical procedures. Some localized soreness in the days following the procedure is a normal part of the healing response. Patients with a history of chronic pain from prior surgery are not excluded from the procedure on that basis — comfort management is part of the clinical protocol throughout.
What does recovery look like after the fibrin procedure for an FBSS patient?
Recovery after the fibrin procedure is substantially less intensive than recovery from revision surgery. Most patients are ambulatory the same day. A short rest period is recommended in the initial days following the procedure, and activity is gradually reintroduced over the following weeks in line with the clinical team’s guidance.
Because each FBSS patient’s anatomy and surgical history are different, the clinical team tailors recovery expectations individually. Patients who have undergone fusion at one spinal level, for example, may have adjacent segment involvement that requires a slightly different approach. A clinical evaluation is the only way to establish realistic recovery expectations for a specific patient’s history.
For additional context on what the post-procedure period involves, see: Heal Post-Surgical Pain: Evaluate Regenerative Spine Care.
Are veterans with FBSS eligible for the fibrin procedure through the VA?
Under the Mission Act, the procedure may be a covered VA benefit when the VA cannot provide timely or appropriate care for a veteran’s condition. VA coverage is determined case-by-case by the VA, not by Valor Spine. Valor coordinates the referral process directly with VA referral coordinators — including handling the paperwork — so veterans do not have to navigate the system alone.
65.6% of veterans report pain in the past three months, according to VA epidemiology data, and chronic disc-related pain following military service is common. Veterans who have already undergone spine surgery and continue to experience pain are encouraged to schedule a consultation to discuss whether Mission Act referral applies to their situation.
Frequently Asked Questions
What causes Failed Back Surgery Syndrome?
FBSS results when spinal surgery does not resolve the underlying source of pain. Persistent annular tears, epidural scar tissue, recurrent disc herniation, adjacent segment disease, and surgical site at a level that was not the true pain generator are among the most common causes. A spine specialist can identify which factor is driving continued pain through updated imaging and a clinical evaluation. For most patients, annular tears that were not directly addressed by the original surgery remain a primary contributor.
Is biologic disc repair a second surgery?
No. The fibrin procedure is a minimally invasive outpatient treatment, not a repeat surgery. It involves no incisions, no general anesthesia requirement, and no fusion or tissue removal. It is designed to seal annular tears within the disc using an FDA-approved fibrin sealant delivered through a thin imaging-guided catheter.
How do I know if I am a candidate for the fibrin procedure after a prior surgery?
Candidacy depends on whether your ongoing pain is driven by disc pathology — specifically annular tears — that can be identified and accessed. A clinical evaluation is the only way to know for certain. The evaluation typically includes review of your prior surgical records, current MRI, and a consultation with the clinical team. Patients with certain anatomical conditions or non-disc-related pain sources may not be candidates.
What is the success rate for fibrin injection in failed surgery patients?
Among outcome data tracking failed-surgery patients, 80% reported positive outcomes with intra-annular fibrin injection. Individual outcomes vary based on the patient’s specific disc pathology, surgical history, and overall health. Population-level statistics describe group trends and are not a guarantee of any individual result. A consultation and clinical evaluation provide a more accurate basis for individual expectations.
Does prior spinal fusion affect eligibility for the fibrin procedure?
Prior fusion does not automatically disqualify a patient. Many FBSS patients develop pain at disc levels adjacent to a fusion — a condition called adjacent segment disease — and those adjacent discs may have annular tears that the fibrin procedure can address. A clinical evaluation identifies whether adjacent disc pathology is present and accessible. See also: What Is Adjacent Segment Disease? The Hidden Risk of Spinal Fusion.
Can veterans access the fibrin procedure through VA benefits?
Under the Mission Act, the procedure may be a covered VA benefit when the VA cannot provide timely or appropriate care. VA coverage decisions are made by the VA on a case-by-case basis. Valor Spine works directly with VA referral coordinators and handles the paperwork on the veteran’s behalf. Schedule a consultation to determine whether a Mission Act referral applies to your situation.
Where can I learn more about FBSS treatment options at Valor Spine?
Several resources on this site go deeper on specific aspects of FBSS care. For a full clinical overview, see What Is Failed Back Surgery Syndrome?. For a patient-focused look at non-surgical answers, see FAQ: Non-Surgical Answers for Post-Surgery Pain. To read about how one retired construction worker achieved significant pain reduction after failed fusion, see 80% Pain Reduction After Failed Fusion.
This content is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified physician. Treatment decisions depend on your individual medical history and clinical findings. Schedule a consultation to discuss whether the procedure is right for you.
The fibrin sealant used in the procedure is FDA-approved as a sealant. Specific clinical applications, candidacy, and outcomes vary by patient.
