Posterior Disc Bulge: Causes, Symptoms & Advanced Treatment in Mumbai
A Posterior disc bulge is one of the most common findings on an MRI spine scan. It occurs when an intervertebral disc extends backward toward the spinal canal, potentially compressing nearby nerves.
While many people in Mumbai are told they have a “disc bulge,” few truly understand:
- Whether it is serious
- Whether surgery is required
- How to treat it properly
- Which specialist to consult
At We Are Spine, Mumbai, our fellowship-trained spine surgeons provide comprehensive evaluation and advanced treatment for posterior disc bulge at leading hospitals including:
- Lilavati Hospital, Bandra
- Breach Candy Hospital
- P.D. Hinduja National Hospital
What Is a Posterior Disc Bulge?
The spine is composed of vertebrae separated by intervertebral discs. These discs act as shock absorbers.
Each disc has
- Outer layer: Annulus fibrosus
- Inner gel-like core: Nucleus pulposus
A posterior disc bulge occurs when the disc extends backward (posteriorly) into the spinal canal. Unlike a herniation, the outer annulus may remain intact — but the disc contour bulges outward.
Posterior vs Central vs Paracentral Bulge
MRI reports often describe:
- Posterior disc bulge
- Posterocentral bulge
- Paracentral bulge
- Foraminal bulge
These describe the direction of disc displacement.
Posterior bulges are significant because they may:
- Narrow the spinal canal
- Compress spinal nerve roots
- Cause sciatica or radiculopathy
Posterior Disc Bulge vs Herniated Disc
| Disc Bulge | Disc Herniation |
|---|---|
| Broad-based extension | Focal tear in annulus |
| Usually mild to moderate | Often more severe |
| May not cause symptoms | More likely to compress nerves |
Posterior disc bulges most commonly affect:
- L4-L5
- L5-S1
- C5-C6
- C6-C7
Lumbar bulges typically cause:
Cervical bulges cause:
- Neck pain
- Arm numbness
- Tingling
Understanding the exact level is critical for precise treatment planning.
Causes of Posterior Disc Bulge
Common causes include:
1. Age-Related Degeneration: Disc dehydration reduces elasticity.
2. Prolonged Sitting: Sedentary lifestyle increases lumbar disc pressure.
3. Improper Lifting: Heavy lifting with poor posture.
4. Obesity: Increased mechanical load on spine.
5. Repetitive Microtrauma: Frequent bending or twisting.
6. Trauma or Injury
Symptoms of Posterior Disc Bulge
Symptoms depend on:
- Location
- Severity
- Nerve involvement
Lumbar Posterior Disc Bulge Symptoms
- Lower back pain
- Pain radiating to leg (sciatica)
- Tingling in foot
- Numbness
- Weakness in ankle or toes
Cervical Posterior Disc Bulge Symptoms
- Neck stiffness
- Shoulder pain
- Arm numbness
- Hand tingling
- Reduced grip strength
Is Posterior Disc Bulge Serious?
Most posterior disc bulges are manageable without surgery. However, it becomes serious if:
- Persistent nerve compression occurs
- Muscle weakness develops
- Pain lasts beyond 6–8 weeks despite treatment
Why Choose We Are Spine for Posterior Disc Bulge Treatment
- Fellowship-trained spine surgeons
- Dedicated spine-only practice
- Advanced minimally invasive expertise
- Treatment at India’s leading hospitals
- Evidence-based protocols
- Patient-first ethical approach
Posterior Disc Bulge (People Also Ask)
Is posterior disc bulge curable?
Yes. Most cases improve with conservative treatment. Surgery is required only in severe or persistent cases.
Is posterior disc bulge dangerous?
It can become serious if it compresses nerves severely, especially causing weakness or bladder symptoms.
Can posterior disc bulge heal naturally?
Mild bulges often stabilize and symptoms reduce with physiotherapy and activity modification.
What is L4-L5 posterior disc bulge?
It is a bulge between the 4th and 5th lumbar vertebrae — a common cause of sciatica.
How long does posterior disc bulge pain last?
Acute symptoms may last 4–6 weeks. Persistent symptoms require specialist evaluation.