What types of back pain are there?
 

• Acute: Less than 4 weeks

• Subacute: 4–12 weeks

• Chronic: 12 weeks or longer
   

• Mechanical/Axial Pain: Primarily localized to the back and surrounding muscles and joints.

• Radicular Pain: Pain caused by irritation or compression of a spinal nerve root, often radiating into an arm or leg.

• Secondary/Non-Mechanical Pain: Back pain caused by inflammatory disease, infection, fracture, cancer, or disease originating outside the spine.
   

What are serious conditions that require urgent evaluation?
 

• Cauda Equina Syndrome (Surgical Emergency): New-onset urinary retention or overflow incontinence, fecal incontinence, progressive or severe neurological deficits in the lower extremities, and saddle anesthesia (loss of sensation in the perianal, perineal, and genital regions).

• Malignancy: History of cancer, unexplained weight loss, constant pain unaffected by position, failure to improve after 4–6 weeks of conservative therapy, and age over 50 or under 20.

• Spinal Infection (Osteomyelitis, Discitis, or Epidural Abscess): Fever, chills, intravenous drug use, recent invasive spinal procedures, immunosuppression, or unremitting severe nocturnal pain.

• Fracture: History of major trauma, minor trauma or heavy lifting in elderly or osteoporotic patients, or prolonged corticosteroid use.

Primary Causes of Back Pain
 

Mechanical Back Pain 
 

• Lumbar Strain / Sprain: Musculoligamentous injury resulting from sudden loading, heavy lifting, or unaccustomed physical exertion.

• Degenerative Disc Disease (DDD): Age-related dehydration and micro-tearing of the anulus fibrosus, leading to loss of disc height and mechanical stress on facet joints.

• Facet Joint Arthropathy: Degeneration and osteoarthritis of the posterior zygapophyseal joints, causing localized axial pain worsened by lumbar extension and rotation.

Radiculopathy & Nerve Compression
 

• Lumbar Radiculopathy ("Sciatica"): Compression or inflammation of a lumbar/sacral nerve root (most commonly L5 or S1) causing sharp, shooting pain radiating down the posterior or lateral leg below the knee, often accompanied by paresthesias or motor weakness. Often caused by degenerative changes, herniated discs, and spondylolisthesis. 

• Lumbar Spinal Stenosis: Narrowing of the spinal canal or neural foramina due to degenerative changes, ligamentum flavum hypertrophy, and facet arthropathy. Characterized by neurogenic claudication—pain, numbness, or weakness in the legs provoked by walking or lumbar extension and relieved by sitting forward or lumbar flexion (the "shopping cart sign").

Disc Herniation
 

• Acute Herniated Nucleus Pulposus (HNP): Extrusion of the gelatinous nucleus pulposus through a tear in the anulus fibrosus, causing mechanical irritation and chemical inflammation of adjacent nerve roots. Often caused by aging, trauma, improper lifting. 

Secondary & Non-Mechanical Etiologies
 

• Inflammatory Back Pain (Axial Spondyloarthritis / Ankylosing Spondylitis): Characterized by insidious onset before age 40, morning stiffness lasting greater than 30 minutes, improvement with exercise rather than rest, and nocturnal pain that wakes the patient in the second half of the night.

• Spondylolysis & Spondylolisthesis: Stress fracture of the pars interarticularis (spondylolysis) or anterior slippage of one vertebral body over the one below it (spondylolisthesis), commonly affecting active adolescents or older adults.

• Visceral and Retroperitoneal Sources: Referred pain from renal pathology (nephrolithiasis, pyelonephritis), aortic aneurysm, pancreatitis, pelvic inflammatory disease, or endometriosis that mimics mechanical back pain.

Diagnostic Workup
 

• History and Physical Examination

• Imaging:​

  • Routine Imaging (X-Ray / MRI): Generally not recommended for uncomplicated mechanical back pain, as imaging abnormalities (like disc bulges or degenerative changes) are extremely common in asymptomatic individuals and rarely change initial conservative management.

  • MRI may be appropriate when significant symptoms persist despite appropriate conservative treatment—particularly when radiculopathy or spinal stenosis is present and the results would change management, such as when surgery or an intervention is being considered.

Management & Treatment Categories

Conservative & Non-Pharmacologic Therapy (First-Line)
 

• Patient Education & Activity Modification: Reassurance regarding the favorable prognosis of acute mechanical back pain; encouraging patients to stay active and avoid prolonged bed rest, which delays recovery.

• Physical Therapy

• Multidisciplinary / Interdisciplinary Care: Cognitive behavioral therapy (CBT) and graded exercise programs for chronic or persistent back pain involving fear-avoidance behaviors.

Procedures 
 

• Epidural Steroid Injections (ESIs): Targeted corticosteroid injections into the epidural space to reduce inflammation around compressed nerve roots in radiculopathy or spinal stenosis.

• Facet Joint Injections / Radiofrequency Ablation (RFA): Diagnostic blocks followed by thermal ablation of the medial branches for recalcitrant facet arthropathy.

• Surgical Decompression (Laminectomy / Microdiscectomy): Indicated for progressive neurological deficits, cauda equina syndrome, intractable radiculopathy failing conservative management, or severe, functionally limiting spinal stenosis.
   

Pharmacotherapy
 

• NSAIDs — Medications such as ibuprofen, naproxen, or prescription NSAIDs may provide short-term relief when medically appropriate.

• Skeletal Muscle Relaxants — Medications such as cyclobenzaprine or methocarbamol may sometimes be used short-term for acute low-back pain, although sedation and other side effects can occur.

• Duloxetine — May be considered for some patients with chronic low-back pain.

• Gabapentin/Pregabalin — These medications are effective for certain neuropathic pain disorders but have not demonstrated consistent benefit for routine low-back pain or sciatica and are not routinely recommended solely for these conditions.

• Topical Treatments — Topical NSAIDs, lidocaine, or other topical agents may sometimes be considered for localized musculoskeletal pain, although evidence varies depending on the underlying cause.

• Systemic Corticosteroids — Are not routinely recommended for nonspecific mechanical low-back pain. Their benefit for lumbar radiculopathy is limited and should be considered selectively rather than routinely.
  
  
                                                    References & Guidelines
   

• American College of Physicians (ACP). Clinical Practice Guideline: Noninvasive Treatments for Acute, Subacute, and Chronic Low Back Pain.

• American College of Radiology (ACR). Appropriateness Criteria: Low Back Pain.

• U.S. Department of Veterans Affairs/Department of Defense (VA/DoD). Clinical Practice Guideline for the Diagnosis and Treatment of Low Back Pain.

• Centers for Disease Control and Prevention (CDC). Clinical Practice Guideline for Prescribing Opioids for Pain.

• North American Spine Society (NASS). Evidence-Based Clinical Guidelines for Lumbar Disc Herniation With Radiculopathy and Degenerative Lumbar Spinal Stenosis.
  
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• *I do not prescribe opioids for the long-term management of chronic non-cancer pain. Long-term opioid therapy can cause tolerance, physical dependence, sedation, constipation, opioid-induced hyperalgesia, respiratory depression, opioid use disorder, and accidental overdose. Chronic back pain is generally better approached with an individualized multimodal strategy, which may include physical activity and rehabilitation, non-opioid medications, behavioral approaches, treatment of the underlying condition, and interventional or surgical treatment when appropriate.