Herniated Disc: Types, Symptoms, and Treatment of Lumbar, Cervical, and Thoracic Discs

A herniated disc, often called a slipped disc or disc prolapse, is one of the most common causes of back and neck pain. It can affect the lumbar (lower back), cervical (neck) or thoracic (mid-back) spine, and its symptoms and treatment depend on where the herniation is, what type it is, and how much it presses on the nerves. Fortunately, most cases improve without surgery when correctly diagnosed and treated.

What Is a Herniated Disc?

Between each two vertebrae sits an intervertebral disc that acts as a shock absorber. Each disc has a tough outer ring called the annulus fibrosus and a soft, gel-like centre called the nucleus pulposus.

A disc herniates when the outer ring weakens or tears and the inner material pushes beyond its normal boundary. The displaced material can compress a nerve root or the spinal cord, causing pain, numbness or weakness.

What Causes a Herniated Disc?

Age-related disc degeneration, as discs lose water content and elasticity

Lifting heavy loads incorrectly, especially with bending and twisting

Prolonged sitting and poor posture

Excess body weight, which increases the load on the lumbar spine

Smoking, which reduces the nutrition of the disc

Genetic factors and direct spinal injury

Types of Disc Herniation by Severity

Based on MRI appearance, disc herniations are classified scientifically as:

Disc bulge: a broad, symmetrical extension of the disc margin without a clear tear, often part of normal ageing

Protrusion: a focal displacement of disc material where the base remains wider than the displaced part

Extrusion: nucleus material escapes through a tear in the annulus, and the displaced part is wider than its base

Sequestration: a fragment separates completely from the disc and may migrate within the spinal canal

Interestingly, more advanced types such as extrusion and sequestration can shrink or be reabsorbed spontaneously in a meaningful proportion of patients, because the immune system reacts to the displaced disc material.

Types of Disc Herniation by Location

Central: directed toward the middle of the spinal canal, and may compress the spinal cord or several nerve roots

Paracentral (posterolateral): the most common type, usually compressing a single nerve root

Foraminal and extraforaminal: occurs at or beyond the nerve exit opening, and can cause severe limb pain

Lumbar Disc Herniation (Lower Back)

This is the most common type. Most lumbar herniations occur at L4-L5 or L5-S1.

Common symptoms include:

Lower back pain

Pain radiating to the buttock and leg, known as sciatica

Numbness or tingling in the leg or foot

Weakness of the foot or ankle muscles in some cases

Pain that worsens with prolonged sitting, coughing or sneezing

To learn about other causes of lower back pain, read our article: Back Pain: Causes, Symptoms, and Treatment Options.

Cervical Disc Herniation (Neck)

Cervical herniations most often occur at C5-C6 or C6-C7 and are frequently linked to poor neck posture and long hours on phones and computers.

Symptoms include:

Neck pain and stiffness

Pain radiating to the shoulder and arm (cervical radiculopathy)

Numbness in the arm or fingers

Weakness of hand grip

When the disc compresses the spinal cord (cervical myelopathy), patients may have difficulty with fine hand movements such as buttoning a shirt, or problems with balance when walking. This needs prompt assessment.

Thoracic Disc Herniation (Mid-Back)

This is the least common type, because the thoracic spine is relatively stable thanks to its attachment to the rib cage. It may cause:

Mid-back pain

Band-like pain wrapping around the chest or abdomen

Numbness or weakness in the legs if the spinal cord is compressed

Its symptoms can mimic heart or stomach conditions, so accurate diagnosis is essential.

How Is a Herniated Disc Diagnosed?

Diagnosis starts with the medical history and a clinical examination, including muscle strength, sensation and reflexes. MRI is the most accurate test for identifying the level, type and degree of nerve compression, and nerve conduction studies are sometimes used to assess nerve involvement.

It is important to know that a herniation on MRI is not always the cause of pain. Many people have disc bulges with no symptoms at all, so imaging must always be matched with symptoms and examination findings.

Treatment Options for a Herniated Disc

1. Conservative Treatment

Most patients improve within 6 to 12 weeks with conservative treatment, which includes:

Modifying daily activity while avoiding prolonged bed rest

Anti-inflammatory medication, pain relief and neuropathic pain medication as appropriate

Physical therapy and core and neck strengthening exercises

Correcting sitting and working posture, and weight loss

2. Targeted Spinal Injections

When nerve pain persists, an epidural steroid injection or a selective nerve root block may be used. These are performed under imaging guidance to reduce inflammation around the nerve and relieve pain, helping the patient continue with physical therapy.

3. Surgical Treatment

Surgery is reserved for specific cases. Common procedures include:

Microdiscectomy for lumbar disc herniation

Endoscopic discectomy through a small incision

Anterior cervical discectomy and fusion (ACDF) or cervical disc replacement

Specialised approaches for thoracic herniation depending on its location

When Does a Herniated Disc Need Surgery?

Severe pain that persists despite 6 to 12 weeks of conservative treatment

Progressive muscle weakness

Signs of spinal cord compression

Cauda equina syndrome: an emergency presenting with loss of bladder or bowel control, numbness in the saddle area and leg weakness, which requires going to the emergency department immediately

Can a Herniated Disc Be Prevented?

You can reduce the risk of a herniated disc, or of it coming back, by exercising regularly, strengthening the abdominal and back muscles, lifting with your knees rather than your back, maintaining a healthy weight, stopping smoking, and taking breaks during long periods of sitting.

Summary

A herniated disc can affect the lumbar, cervical or thoracic spine, and ranges from a simple bulge to a sequestered fragment. Most cases improve with conservative care and physical therapy, while a small proportion need injections or surgery. The key is always an accurate diagnosis that links symptoms, examination and MRI findings, so the right treatment can be chosen for each patient.

References

Fardon DF, Williams AL, Dohring EJ, et al. Lumbar disc nomenclature: version 2.0. Spine J. 2014;14(11):2525-2545.

Kreiner DS, Hwang SW, Easa JE, et al. An evidence-based clinical guideline for the diagnosis and treatment of lumbar disc herniation with radiculopathy. Spine J. 2014;14(1):180-191.

Bono CM, Ghiselli G, Gilbert TJ, et al. An evidence-based clinical guideline for the diagnosis and treatment of cervical radiculopathy from degenerative disorders. Spine J. 2011;11(1):64-72.

Chiu CC, Chuang TY, Chang KH, et al. The probability of spontaneous regression of lumbar herniated disc: a systematic review. Clin Rehabil. 2015;29(2):184-195.

Brinjikji W, Luetmer PH, Comstock B, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR Am J Neuroradiol. 2015;36(4):811-816.

Peul WC, van Houwelingen HC, van den Hout WB, et al. Surgery versus prolonged conservative treatment for sciatica. N Engl J Med. 2007;356(22):2245-2256.

Arce CA, Dohrmann GJ. Herniated thoracic disks. Neurol Clin. 1985;3(2):383-392.

National Institute for Health and Care Excellence (NICE). Low back pain and sciatica in over 16s: assessment and management (NG59). 2016, updated 2020.

Medically reviewed by: Dr. Osama Droubi, Specialist Orthopedic Surgeon

Review date: October 19, 2026