Failed Back Surgery Syndrome

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Overview

Failed back surgery syndrome (FBSS) refers to persistent or recurring back pain after spine surgery. The pain may remain the same as before surgery or become worse.

Back surgery is often performed to treat conditions such as herniated discs, spinal stenosis, or nerve compression. However, some patients continue to experience pain even after the procedure. Failed back surgery syndrome can involve ongoing nerve irritation, structural problems in the spine, or complications from the surgery itself.

Urban Spine and Joint

Symptoms

Symptoms vary depending on the underlying cause but often include:

  1. Persistent lower back pain after surgery
  2. Pain that radiates into the legs
  3. Numbness or tingling in the legs or feet
  4. Muscle weakness in the lower extremities
  5. Difficulty performing daily activities
  6. Pain that worsens with standing or walking

Some patients may also experience limited mobility or ongoing nerve-related symptoms.

Causes

Several factors can lead to failed back surgery syndrome.

Common causes include:

  1. Scar tissue forming around spinal nerves after surgery
  2. Spinal instability following the procedure
  3. Failed spinal fusion (pseudoarthrosis)
  4. Nerve damage during surgery
  5. Arachnoiditis, an inflammation of the membranes surrounding spinal nerves
  6. Degeneration of discs near the surgical area
  7. Persistent nerve compression from spinal stenosis

In some cases, the original cause of back pain may not have been fully resolved.

Diagnosis

Diagnosis begins with a medical history and physical examination. The doctor will review prior surgical records and evaluate symptoms such as pain, weakness, numbness, or limited movement.

Diagnostic testing may include:

  1. X-rays to evaluate spinal alignment and stability
  2. EOS imaging, a three-dimensional X-ray used to assess spinal alignment
  3. MRI scans to detect disc problems, scar tissue, or nerve compression
  4. Bone scans to identify fractures or bone abnormalities

These tests help determine the cause of persistent pain after surgery.

Treatment Options

Conservative (Non-Surgical) Treatment

Treatment often begins with non-surgical care.

Common treatment options include:

  1. Physical therapy to improve mobility and strength
  2. Pain medications to manage symptoms
  3. Counseling or pain management support

Surgical Treatment

If pain persists, interventional pain management procedures may be recommended, including:

  1. Steroid injections to reduce inflammation around spinal nerves
  2. Spinal cord stimulation to interrupt pain signals
  3. Intrathecal pain pumps that deliver medication directly to the spinal cord

Additional surgery is usually considered only when other treatments fail and a correctable spinal problem is identified.

Frequently Asked Questions

It’s persistent or recurring back pain after spine surgery — the pain may stay the same as before the operation or get worse, even though the surgery was meant to resolve it.

Common causes include scar tissue forming around spinal nerves, spinal instability, a failed spinal fusion, nerve damage during surgery, arachnoiditis, or the original problem not being fully resolved by the procedure.

Persistent lower back pain, pain radiating into the legs, numbness or tingling, muscle weakness, and pain that worsens with standing or walking are common signs.

Diagnosis starts with a review of prior surgical records and a physical exam, often followed by imaging such as X-rays, MRI, EOS imaging, or bone scans to pinpoint the cause of ongoing pain.

In many cases, yes — treatment often starts with conservative options like physical therapy, medication, and injections before another surgical procedure is considered.