Lumbar Disc Herniation

Spine

Overview

Lumbar disc herniation occurs when the nucleus pulposus of an intervertebral disc protrudes through the annulus fibrosus, potentially compressing nerve roots or the spinal cord. This condition is a common cause of lower back pain and may present with radiculopathy extending into the lower limbs. The severity ranges from asymptomatic disc protrusion to severe neurological compromise requiring surgical intervention.

Pathophysiology

The lumbar intervertebral disc consists of a central nucleus pulposus surrounded by the annulus fibrosus. Degenerative changes, repetitive loading, trauma, or combined flexion-rotation forces can cause annular tears, allowing nuclear material to herniate posteriorly or posterolaterally. The herniated disc material may compress adjacent nerve roots (L3, L4, L5, S1) or the cauda equina, causing inflammation and ischemia. This mechanical compression combined with inflammatory mediator release (TNF-alpha, IL-1, IL-6) triggers pain and neurological symptoms. Severity depends on the size and location of the herniation and the individual's spinal canal dimensions.

Typical Presentation

Site

Lower lumbar spine (L4-L5 and L5-S1 most common); pain may radiate into buttock, lateral thigh, calf, or foot depending on nerve root involved; unilateral presentation typical

Quality

Deep aching or sharp pain in lumbar region; radiating pain described as burning, shooting, or electric; numbness or tingling in dermatomal distribution

Intensity

Variable from mild to severe; often 4-8/10 at presentation; radicular pain frequently more distressing than local back pain

Aggravating

Forward flexion and bending (especially repeated); sitting prolonged; heavy lifting; coughing or Valsalva maneuver; movements that increase intradiscal pressure

Relieving

Prone lying; extension movements; recumbency; heat application; relief of radicular pain often faster than resolution of axial pain

Associated

Neurological signs (weakness, diminished reflexes, sensory loss in dermatomal pattern); positive straight leg raise (SLR) or crossed SLR; muscle guarding; limitation of spinal movement; buttock pain; possible bowel/bladder changes in cauda equina syndrome

Orthopaedic Tests

Straight Leg Raise (SLR) Test

Procedure

Patient supine; examiner passively raises the patient's leg with knee extended. The test is positive if radicular pain is reproduced along the distribution of the affected nerve root.

Positive Finding

Reproduction of radicular leg pain (not just back or hamstring tightness) between 0–60° of hip flexion

Sensitivity / Specificity

91% / 26%

Majlesi et al., 2008, Spine

Interpretation

High sensitivity makes SLR useful for ruling out nerve root compression; low specificity means positive result does not confirm herniation. Most valuable when combined with other tests.

Crossed Straight Leg Raise (Crossed SLR)

Procedure

Patient supine; examiner passively raises the opposite (unaffected) leg with knee extended. Test is positive if radicular pain is reproduced on the symptomatic side.

Positive Finding

Reproduction of radicular pain on the affected side during contralateral leg raise

Sensitivity / Specificity

29% / 88%

Majlesi et al., 2008, Spine

Interpretation

Low sensitivity but high specificity; a positive crossed SLR strongly suggests nerve root compression and is highly specific for disc herniation with nerve involvement.

Lasègue's Test (Modified SLR with Neck Flexion)

Procedure

Patient supine with legs extended. Examiner performs SLR; if pain occurs, neck is passively flexed. Relief of radicular pain with neck flexion is a positive finding.

Positive Finding

Increased or reproduced radicular pain with SLR that is relieved or reduced by passive neck flexion

Sensitivity / Specificity

null / null

Interpretation

Suggests meningeal irritation or nerve root tension; supportive finding when combined with SLR. Less commonly cited than standard SLR but may support nerve root involvement.

Femoral Nerve Stretch Test (Reverse SLR)

Procedure

Patient prone or side-lying; examiner passively flexes knee and extends hip. Test is positive if anterior thigh or groin pain is reproduced.

Positive Finding

Reproduction of radicular pain in anterior thigh or groin distribution (L2–L4 nerve roots)

Sensitivity / Specificity

null / null

Interpretation

Useful for detecting higher lumbar disc herniations (L2–L4) that compress anterior nerve roots. Complements SLR which primarily assesses lower lumbar and sacral roots.

Slump Test

Procedure

Patient seated; examiner applies sequential trunk flexion, knee extension, and ankle dorsiflexion while monitoring for symptoms. Pain reproduction indicates positive test.

Positive Finding

Reproduction of radicular or referred leg pain; relief of pain with cervical extension suggests nerve root tension origin

Sensitivity / Specificity

84% / 83%

Rebolloso-Molina et al., 2019, Diagnostics

Interpretation

Good sensitivity and specificity for detecting nerve root involvement. Positive result suggests mechanically sensitive neural tissue consistent with disc herniation or root compression.

Palpation for Segmental Tenderness and Neurological Examination

Procedure

Assess lower limb myotomes (strength), dermatomes (sensation), and reflexes (patellar and Achilles). Correlate findings with suspected nerve root level based on pain distribution and other test results.

Positive Finding

Neurological deficit (weakness, sensory loss, or reflex diminishment) corresponding to a specific dermatome or myotome distribution

Sensitivity / Specificity

null / null

Interpretation

Presence of objective neurological deficit significantly strengthens diagnosis and helps localize the level of nerve root compression. Absence does not exclude herniation.

⚠ Red Flags

  • •Bilateral leg symptoms or saddle anesthesia (possible cauda equina syndrome—emergency)
  • •Progressive neurological deficit or footdrop (nerve compression severity)
  • •Bowel or bladder dysfunction including urinary retention or incontinence
  • •Perianal sensory loss or loss of anal tone
  • •Fever with spinal pain (infection)
  • •Unintentional weight loss with spinal pain
  • •Severe night pain unrelieved by position changes
  • •History of cancer with spinal pain
  • •Signs of systemic infection or immunosuppression

⚡ Yellow Flags

  • •Psychosocial distress disproportionate to clinical findings
  • •High levels of pain catastrophizing or fear-avoidance beliefs
  • •Passive coping strategies with low self-efficacy
  • •Significant work dissatisfaction or pending litigation
  • •Social isolation or limited support systems
  • •Sleep disruption beyond pain-related causes
  • •Excessive health-seeking behavior or symptom amplification
  • •History of trauma (physical or psychological) preceding symptom onset

Osteopathic Techniques

Region

Lumbar spine and sacroiliac joints

Technique

Soft Tissue

Rationale

Reduces muscular guarding and hypertonicity in erector spinae, quadratus lumborum, and piriformis, improving local circulation and reducing pressure on herniated disc; enhances proprioceptive feedback to stabilizing musculature

Region

Lumbar spine

Technique

MET

Rationale

Gentle post-isometric relaxation of paraspinal muscles and hip flexors reduces reflex muscular splinting; helps restore segmental mobility without aggressive manipulation; particularly useful for acute presentations where HVLA contraindicated

Region

Thoracic and cervical spine

Technique

Articulation

Rationale

Improves regional mobility and reduces compensatory stress on lumbar spine; enhances overall spinal proprioception and motor control; addresses upper kinetic chain dysfunction contributing to aberrant loading patterns

Region

Sacroiliac joint and lumbar-sacral region

Technique

Functional

Rationale

Positions tissues in positions of ease to reduce pain-driven splinting; facilitates restoration of natural segmental mechanics without provocative loading; valuable in acute phase when range-of-motion techniques poorly tolerated

Region

Abdominal and pelvic cavity

Technique

Lymphatic

Rationale

Enhances drainage of inflammatory mediators and reduces local edema around compressed nerve roots; improves fluid dynamics in affected neural tissue; supports resolution phase of inflammation

Region

Craniosacral system

Technique

Cranial

Rationale

Optimizes cerebrospinal fluid circulation and reduces intrathecal pressure; addresses global nervous system tone and facilitates parasympathetic dominance; supports pain modulation through vagal mechanisms

Add-On Approaches

Chinese Medicine

Acupuncture targeting points along the Bladder meridian (BL23, BL24, BL25, BL40) and Governing Vessel (GV3, GV4); moxibustion for cold-damp stagnation patterns; herbal remedies such as Du Zhong (Eucommiae) or Juan Bi Tang to tonify kidney yang and promote circulation; cupping therapy over affected paraspinal regions to invigorate blood and clear stagnation

Chiropractic

Spinal manipulation contraindicated in acute disc herniation with nerve compression; however, mobilization of hypomobile segments above and below herniation level may help; spinal decompression therapy (non-force) may reduce intradiscal pressure; postural and ergonomic advice tailored to individual movement patterns

Physiotherapy

Progressive rehabilitation focusing on motor control and deep abdominal stabilization (transversus abdominis, multifidus); quadruped exercises and progressive loading; neural mobility exercises (nerve gliding) to improve mechanosensitivity of affected root; postural education and ergonomic modification; evidence supports early active rehabilitation over passive approaches

Remedial Massage

Deep tissue massage to paraspinal and gluteal musculature; trigger point therapy for piriformis and gluteus medius; myofascial release techniques to reduce fascial restrictions limiting mobility; avoid direct pressure over acutely herniated disc; cross-friction techniques on muscular adhesions; progressive massage intensity as acute inflammation resolves

Rehabilitation Exercises

Lumbar Extension in Standing (Prone Press-Ups)

Range of MotionBeginner

Prone Hip Flexor Stretch

StretchingBeginner

Piriformis Stretch (Supine Figure-4)

StretchingBeginner

Transversus Abdominis Activation (Abdominal Hollowing)

StrengtheningBeginner

Quadruped Bird Dog (Alternating Limbs)

StrengtheningIntermediate

Bridging with Glute Activation

StrengtheningIntermediate

Single-Leg Stance with Core Engagement

BalanceIntermediate

Pelvic Tilts in Supine

PosturalBeginner

Wall Posture Alignment and Awareness

PosturalBeginner

Dead Bug (Supine Alternating Limb Extension)

StrengtheningIntermediate

Walking Program with Progressive Distance

CardiovascularBeginner

Controlled Spinal Rotation in Standing

Range of MotionIntermediate

Referral Criteria

  • •Presence of any red flag signs, especially cauda equina syndrome indicators—refer immediately to emergency department
  • •Progressive neurological deficit (weakness, sensory loss worsening over days) despite conservative care—refer to neurosurgery or spine specialist
  • •Severe, unrelenting pain unresponsive to conservative management after 4-6 weeks—consider imaging and specialist evaluation
  • •Signs of infection (fever, elevated inflammatory markers, constitutional symptoms)—refer to medical physician
  • •Significant functional limitation affecting activities of daily living despite 6-8 weeks of treatment—refer to specialist for imaging and imaging-guided interventions (epidural injection, facet injection)
  • •Imaging-confirmed large herniation with severe canal compromise and clinical correlation—refer to spine surgeon for surgical candidacy evaluation
  • •Significant psychosocial yellow flags affecting rehabilitation adherence—consider referral to psychologist or pain management specialist
  • •Recurrent herniation at same or different levels despite appropriate rehabilitation—refer for surgical consultation
  • •Symptoms suggestive of myelopathy (gait disturbance, upper limb involvement, hyperreflexia)—refer urgently for MRI and neurological assessment