1. Introduction
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Acute back muscle spasms are sudden, involuntary contractions of paraspinal or surrounding muscles in the lumbar/thoracic region.
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Commonly linked to acute strain, postural overload, or protective response to underlying pathology (disc injury, facet irritation).
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Very frequent in clinical practice and often self-limiting, but physiotherapy plays a key role in pain relief, restoring mobility, and preventing recurrence.
Acute back muscle spasms are sudden, involuntary contractions of paraspinal or surrounding muscles in the lumbar/thoracic region.
Commonly linked to acute strain, postural overload, or protective response to underlying pathology (disc injury, facet irritation).
Very frequent in clinical practice and often self-limiting, but physiotherapy plays a key role in pain relief, restoring mobility, and preventing recurrence.
2. Causes / Pathophysiology
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Muscle strain/overuse (lifting, sudden movement, poor ergonomics).
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Reflex spasm to protect injured tissue (e.g., disc herniation, facet joint irritation).
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Predisposing factors: weak core, prolonged sitting, poor posture, stress, cold exposure.
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Pathophysiology: local muscle fibers contract involuntarily → ↓ blood flow → ischemia → pain → more spasm (vicious cycle).
Muscle strain/overuse (lifting, sudden movement, poor ergonomics).
Reflex spasm to protect injured tissue (e.g., disc herniation, facet joint irritation).
Predisposing factors: weak core, prolonged sitting, poor posture, stress, cold exposure.
Pathophysiology: local muscle fibers contract involuntarily → ↓ blood flow → ischemia → pain → more spasm (vicious cycle).
3. Clinical Features
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Sudden onset of severe, localized back pain.
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Tightness, stiffness, and restricted ROM (especially flexion/extension).
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Palpable knots or hard bands in paraspinal muscles.
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Pain may worsen with movement, coughing, or sneezing.
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Usually no neurological signs (if present → suspect disc/nerve involvement).
Sudden onset of severe, localized back pain.
Tightness, stiffness, and restricted ROM (especially flexion/extension).
Palpable knots or hard bands in paraspinal muscles.
Pain may worsen with movement, coughing, or sneezing.
Usually no neurological signs (if present → suspect disc/nerve involvement).
4. Assessment
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History: activity at onset, trauma, posture, recurrence.
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Observation: guarded posture, antalgic movements.
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Palpation: taut bands, tenderness.
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ROM: limited due to pain and tightness.
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Red flags to rule out: neurological deficit, bowel/bladder dysfunction, unexplained weight loss, fever.
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Outcome Measure: NPRS/VAS (pain), ODI (disability).
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History: activity at onset, trauma, posture, recurrence.
Observation: guarded posture, antalgic movements.
Palpation: taut bands, tenderness.
ROM: limited due to pain and tightness.
Red flags to rule out: neurological deficit, bowel/bladder dysfunction, unexplained weight loss, fever.
Outcome Measure: NPRS/VAS (pain), ODI (disability).
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