Causes of Upper Back Pain
Upper back pain (thoracic back pain) can arise from benign musculoskeletal conditions, but also from serious underlying pathology including inflammatory, neoplastic, metabolic, infectious, and degenerative conditions that require careful evaluation. 1
Primary Categories of Causes
Spine-Related Causes
Degenerative and Mechanical:
- Thoracic disc disease (less common than cervical/lumbar due to rib cage stabilization, most frequent below T7) 1
- Myofascial pain syndrome with trigger points (most common cause of upper back pain) 2
- Osteoporotic compression fractures (thoracic spine is a common site) 1
- Functional disturbances of intervertebral joints 3
- Degenerative disorders of the spine 3
Serious Pathology ("Red Flags"):
- Malignancy (primary or metastatic tumors) 1, 4
- Infection (discitis, osteomyelitis, epidural abscess) 1, 4
- Fractures (traumatic or pathologic) 1, 4
- Spinal cord compression or deformity 1
- Symptomatic spinal canal stenosis 1
Inflammatory Conditions:
- Ankylosing spondylitis 1, 4
- Psoriatic spondylitis 1
- Reactive arthritis 1
- Inflammatory bowel disease-related spine disorders 1
Metabolic:
Extra-Vertebral Causes
Systemic conditions that can mimic or cause upper back pain include: 1, 3
- Cardiovascular: Acute coronary syndrome (can present as isolated upper back pain, particularly in high-risk occupations) 6
- Intrathoracic pathology 1
- Renal conditions 1
- Vascular etiologies 1
- Gastrointestinal causes 1
- Psychobiosocial disturbances 3
- Muscular overload (especially in construction workers and professional drivers) 3, 7
Clinical Approach Algorithm
Step 1: Identify Red Flags Requiring Immediate Evaluation
Look for: 1
- Significant trauma history
- Myelopathy symptoms (weakness, gait disturbance, bowel/bladder dysfunction)
- Age >65 years or chronic steroid use (fracture risk)
- Known osteoporosis
- History of cancer
- Constitutional symptoms (fever, weight loss, night sweats)
- Prior thoracic spine fusion
If red flags present: Early imaging and specialist evaluation warranted immediately.
Step 2: Assess Duration and Response to Treatment
- Acute (<4 weeks): Often benign and self-limited 1
- Subacute (4-12 weeks): Consider imaging if no improvement with conservative management 1
- Chronic (>12 weeks): Warrants thorough evaluation 1
Step 3: Consider Occupational and Cardiovascular Risk Factors
Critical pitfall: Professional drivers and construction workers have both high rates of musculoskeletal pain AND increased cardiovascular disease risk 6, 7. Even when musculoskeletal pain seems obvious, assess cardiovascular risk factors (smoking, hypertension, dyslipidemia) as acute coronary syndrome can present as isolated upper back pain 6.
Treatment Implications Based on Cause
For uncomplicated acute thoracic back pain without red flags: Conservative management with medical therapy and physical therapy is appropriate for up to 6 weeks before considering imaging 1.
For myofascial pain syndrome: Rehabilitation exercises combined with thermotherapy and NSAIDs show significant improvement (78% improvement rate with exercise versus 68% without) 2.
For specific pathology: Treatment depends on the underlying cause and requires interdisciplinary management with appropriate specialists 4.
Key Clinical Caveat
The thoracic spine's unique anatomy (rib cage stabilization, limited mobility) makes it less prone to disc disease but more susceptible to serious pathology including malignancy, infection, and compression fractures. 1 Therefore, maintain higher suspicion for serious underlying conditions compared to cervical or lumbar pain, especially when pain persists beyond expected timeframes or occurs in patients with risk factors.