Low Back Pain

Overview

Low back pain is one of the most common health complaints worldwide, affecting up to 80% of people at some point in their lives. It refers to pain in the lumbar region, the area between the bottom of the ribs and the top of the legs. This pain can range from a dull ache to sharp, debilitating pain that significantly impacts daily activities and quality of life.

Low back pain is the leading cause of disability globally and one of the most common reasons for missed work. While most episodes resolve within a few weeks, some people develop chronic pain that persists for months or years, requiring comprehensive management strategies.

Types of Low Back Pain

By Duration

  • Acute: Less than 4 weeks duration
  • Subacute: 4-12 weeks duration
  • Chronic: More than 12 weeks duration

By Cause

  • Mechanical/Non-specific: 90% of cases, no specific pathology identified
  • Radicular: Nerve root compression causing leg symptoms
  • Referred: Pain from other organs felt in the back
  • Specific spinal pathology: Identifiable structural cause

Common Causes

Mechanical Causes (Most Common)

  • Muscle strain: Overuse, poor posture, or sudden movements
  • Ligament sprain: Overstretching of spinal ligaments
  • Disc degeneration: Age-related wear and tear
  • Herniated disc: Disc material pressing on nerves
  • Facet joint dysfunction: Arthritis or injury to spinal joints
  • Sacroiliac joint dysfunction: Problems with pelvis-spine connection
  • Spinal stenosis: Narrowing of spinal canal
  • Spondylolisthesis: Vertebra slipping forward

Non-Mechanical Spinal Conditions

  • Inflammatory arthritis: Ankylosing spondylitis, psoriatic arthritis
  • Infection: Discitis, osteomyelitis, abscess
  • Cancer: Primary or metastatic tumors
  • Osteoporotic fractures: Compression fractures
  • Metabolic bone disease: Paget's disease, osteomalacia

Referred Pain Sources

  • Kidney stones or infection: Flank pain radiating to back
  • Endometriosis: Cyclical back pain in women
  • Abdominal aortic aneurysm: Pulsating mass with back pain
  • Pancreatic disease: Deep, boring back pain
  • Prostate problems: In men

Risk Factors

  • Age (30-50 years highest risk)
  • Obesity
  • Sedentary lifestyle
  • Poor posture
  • Heavy physical work
  • Repetitive bending or twisting
  • Smoking
  • Psychological stress
  • Depression or anxiety

Symptoms and Characteristics

Pain Characteristics

  • Location: Central low back, one-sided, or across the back
  • Quality: Aching, sharp, burning, or stabbing
  • Radiation: May spread to buttocks, hips, or legs
  • Timing: Constant, intermittent, or positional
  • Aggravating factors: Movement, sitting, standing, lifting
  • Relieving factors: Rest, changing positions, heat/cold

Associated Symptoms

  • Muscle spasms or tightness
  • Stiffness, especially in the morning
  • Limited range of motion
  • Difficulty standing straight
  • Pain with coughing or sneezing
  • Numbness or tingling in legs (sciatica)
  • Weakness in legs or feet
  • Changes in bowel or bladder function (emergency)

Red Flag Symptoms

These symptoms may indicate serious underlying conditions requiring immediate evaluation:

  • Cauda equina syndrome: Loss of bowel/bladder control, saddle numbness, bilateral leg weakness
  • Cancer indicators: Age >50, history of cancer, unexplained weight loss, pain at night
  • Infection signs: Fever, IV drug use, recent infection, immunosuppression
  • Fracture risk: Major trauma, minor trauma in elderly, osteoporosis, steroid use
  • Progressive neurological deficit: Worsening weakness, numbness, or reflexes
  • Severe unrelenting pain: Not improved with rest or position changes

Diagnosis

Medical History

  • Pain onset, duration, and progression
  • Mechanism of injury if applicable
  • Previous episodes and treatments
  • Occupational and recreational activities
  • Impact on daily function
  • Psychological factors
  • Red flag screening

Physical Examination

  • Inspection: Posture, gait, deformities
  • Palpation: Tenderness, muscle spasm
  • Range of motion: Flexion, extension, rotation
  • Neurological testing: Strength, reflexes, sensation
  • Special tests: Straight leg raise, crossed straight leg raise
  • Functional assessment: Sitting, standing, walking

Imaging Studies

  • X-rays: Not routinely needed, useful for trauma or red flags
  • MRI: Best for soft tissue, disc, and nerve visualization
  • CT scan: Better for bone detail, fractures
  • Bone scan: For suspected infection or cancer
  • EMG/NCS: If nerve damage suspected

Treatment Options

Conservative Management

  • Activity modification: Avoid bed rest, stay active within limits
  • Physical therapy: Exercises, manual therapy, education
  • Heat/Cold therapy: Ice for acute injury, heat for muscle spasm
  • Posture correction: Ergonomic adjustments
  • Weight loss: If overweight
  • Stress management: Relaxation techniques

Medications

  • NSAIDs: Ibuprofen, naproxen for inflammation
  • Acetaminophen: For pain without inflammation
  • Muscle relaxants: For acute muscle spasm
  • Neuropathic medications: Gabapentin, pregabalin for nerve pain
  • Antidepressants: Duloxetine for chronic pain
  • Topical medications: Creams, patches
  • Opioids: Short-term use only in severe cases

Interventional Procedures

  • Epidural steroid injections: For radicular pain
  • Facet joint injections: For facet-mediated pain
  • Radiofrequency ablation: For chronic facet pain
  • Sacroiliac joint injections: For SI joint dysfunction
  • Trigger point injections: For muscle pain

Alternative Therapies

  • Chiropractic care: Spinal manipulation
  • Acupuncture: May help chronic pain
  • Massage therapy: For muscle tension
  • Yoga: Improves flexibility and strength
  • Tai chi: Low-impact movement therapy
  • Cognitive behavioral therapy: For chronic pain management

Surgery

Reserved for specific conditions with failed conservative treatment:

  • Discectomy: For herniated disc with nerve compression
  • Laminectomy: For spinal stenosis
  • Spinal fusion: For instability or deformity
  • Disc replacement: Alternative to fusion
  • Vertebroplasty/Kyphoplasty: For compression fractures

Prevention

  • Exercise regularly: Core strengthening, flexibility
  • Maintain good posture: Sitting, standing, sleeping positions
  • Proper lifting technique: Bend knees, keep back straight
  • Ergonomic workspace: Proper chair, desk height
  • Healthy weight: Reduces spine stress
  • Quit smoking: Improves disc health
  • Stay active: Avoid prolonged sitting
  • Stress management: Reduces muscle tension
  • Good sleep hygiene: Supportive mattress and pillows

Prognosis

The prognosis for low back pain is generally good:

  • 90% of acute episodes resolve within 6 weeks
  • Most people return to normal activities within 3 months
  • Only 5-10% develop chronic pain
  • Recurrence is common (up to 70% within one year)
  • Early treatment and staying active improve outcomes
  • Psychological factors significantly influence recovery

Living with Chronic Low Back Pain

  • Develop a daily exercise routine
  • Use pacing strategies for activities
  • Join support groups
  • Consider pain psychology programs
  • Explore workplace accommodations
  • Maintain social connections
  • Track pain patterns and triggers
  • Focus on function over pain elimination
  • Regular follow-ups with healthcare team