Low back pain

Differential Diagnosis

Mechanical
- Muscle sprain or strain
- Compression fracture
- Traumatic fracture
- Disc herniation
- Facet joint arthropathy
Inflammatory
- Spondyloarthropathy
  - Ankylosing spondylitis
  - Psoriatic arthritis
  - Enteropathic arthritis
  - Reactive arthritis
Infectious
- Epidural abscess
- Osteomyelitis/discitis
- Intra-abdominal abscess
- Pyelonephritis
Referred pain
- Pancreatitis
- Renal stones
- Aortic aneurysm

Neurological deficits
- Bowel or bladder dysfunction
- Weakness
- Numbness or tingling, especially as a sensory level
- Perianal numbness
Infection
- Fever
- IVDU
- Tuberculosis
- Rigors, chills, or drenching night sweats
Fracture
Tumours
- History of malignancy
- Weight loss
- Anorexia
- Fatigue
Intravenous drug use