Initial Management of Acute Back Pain

Introduction to Conservative Management

The American College of Radiology recommends that for adults presenting with acute back pain and no red flags, imaging is not indicated and conservative management should be initiated immediately, consisting of patient education to remain active, NSAIDs or acetaminophen for pain control, and reassurance about the favorable natural history of the condition 1, 2

The assessment for red flags should include screening for cauda equina syndrome, characterized by urinary retention/incontinence, bilateral leg weakness, and saddle anesthesia, and suspected malignancy, indicated by a history of cancer, unexplained weight loss, or age over 50 with new-onset pain 3
Red flags also include suspected infection, marked by fever, IV drug use, or immunosuppression, and fracture, suggested by significant trauma, osteoporosis, or prolonged corticosteroid use 3

The American College of Radiology suggests that first-line medications include NSAIDs (oral or topical) which provide small to moderate pain improvement with fewer adverse effects than alternatives, and acetaminophen, which may be used though evidence shows limited benefit over placebo 2
Patient education should advise patients to remain active and continue ordinary activities within pain limits, as bed rest should be avoided because it delays recovery 2

Routine imaging (X-ray, MRI, CT) is not indicated in the initial evaluation of uncomplicated back pain without red flags, as numerous studies demonstrate it provides no clinical benefit and leads to increased healthcare utilization 1, 2
Imaging abnormalities are common in asymptomatic individuals and do not correlate with symptoms, with disc protrusions present in up to 43% of asymptomatic 80-year-olds 1, 3

If symptoms persist beyond 6 weeks despite optimal conservative management, consider MRI lumbar spine without contrast for patients who are potential surgical candidates or candidates for epidural steroid injection, and specialist referral for assessment within 2 weeks if pain is disabling 1, 3, 4
Epidural steroid injections may be considered for radiculopathy specifically, with fluoroscopic guidance being the gold standard 3, 4

For children with back pain, radiographs may be useful as initial imaging if red flags are present, with diagnostic yield up to 24% when combined with detailed history and physical examination 5, 6
Red flags in children include morning stiffness, gait abnormalities, night pain, neurologic deficit, radiating pain, fever, weight loss, pain >4 weeks, and abnormal spinal curvature 6
MRI without contrast is the preferred advanced imaging if red flags are present or conservative treatment fails 5, 6