30/10/2026
Sciatica: Causes, Signs & Management
Sciatica is a condition caused by irritation or compression of nerve roots that contribute to the sciatic nerve. It commonly causes sharp, burning, or shooting pain that travels from the lower back or buttock down one leg. Symptoms may include tingling, numbness, or muscle weakness etc.
🔹 Common causes / risk factors
➟ Lumbar disc herniation — a common cause of sciatica
➟ Lumbar spinal stenosis — narrowing around spinal nerves
➟ Degenerative spinal changes
➟ Spondylolisthesis — slipping of one vertebra over another
➟ Prolonged sitting or repetitive heavy lifting
➟ Obesity and reduced physical activity
➟ Rarely, spinal tumours or infections
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🔹 Common signs
➟ Shooting pain from the lower back or buttock down one leg
➟ Burning or electric-shock-like pain
➟ Tingling or pins-and-needles sensations
➟ Numbness in the leg or foot
➟ Pain worsened by prolonged sitting
➟ Pain during coughing or sneezing
➟ Muscle weakness in the affected leg
➟ Difficulty walking or standing comfortably
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🔹 Typical symptom patterns
➟ Pain usually affects one side of the body
➟ May travel from the buttock to the thigh, calf, or foot
➟ Leg pain may be more severe than lower back pain
➟ Symptoms may worsen with bending or sitting
➟ Numbness or tingling may follow a specific nerve-root distribution
➟ Most uncomplicated cases improve gradually over several weeks
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🔹 Diagnosis
➟ Medical history and neurological examination
➟ Assessment of muscle strength, sensation, and reflexes
➟ Straight-leg raise test may reproduce radiating leg pain
➟ MRI of the lumbar spine when severe symptoms, neurological deficits, or persistent pain warrant imaging
➟ Nerve conduction studies or EMG in selected cases
➟ Routine imaging is usually unnecessary during early uncomplicated sciatica
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🔹 Core management
➟ Stay gently active and avoid prolonged bed rest
➟ Physiotherapy and individualized exercise programmes
➟ NSAIDs, such as ibuprofen or naproxen, for short-term pain relief when appropriate
➟ Heat or cold packs for symptom relief
➟ Modify activities that aggravate nerve pain
➟ Epidural steroid injections may provide short-term relief in selected severe cases
➟ Surgical decompression may be considered for persistent disabling symptoms or progressive neurological deficits
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🔹 Lifestyle / self-care
➟ Walk regularly within pain tolerance
➟ Avoid prolonged sitting
➟ Take frequent movement breaks
➟ Practise proper lifting techniques
➟ Strengthen core and back muscles as advised
➟ Maintain a healthy body weight
➟ Use comfortable sitting and sleeping positions
➟ Gradually resume normal activities
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🔹 What not to do
➟ Don't remain on complete bed rest for several days
➟ Don't force some stretches that worsen radiating leg pain
➟ Don't lift heavy objects during severe flare-ups
➟ Don't rely on painkillers without addressing persistent symptoms
➟ Don't assume every episode of leg pain is sciatica
➟ Don't ignore progressive weakness or bladder problems
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🔹 Possible complications
➟ Chronic nerve pain
➟ Persistent leg numbness
➟ Muscle weakness
➟ Reduced mobility
➟ Difficulty sleeping
➟ Rarely, permanent nerve damage
➟ Cauda equina syndrome — a rare neurological emergency
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🔹 When to see a doctor
➟ Pain persisting beyond several weeks
➟ Severe pain interfering with walking or sleeping
➟ Increasing leg numbness or tingling
➟ New muscle weakness
➟ Recurrent episodes of sciatica
➟ Symptoms that do not improve with appropriate treatment
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🔹 Emergency warning
➟ New loss of bladder or bowel control
➟ Numbness around the groin, ge****ls, or inner thighs (saddle anaesthesia)
➟ Rapidly worsening leg weakness
➟ Severe symptoms affecting both legs
➟ Severe back pain with fever and significant illness
➟ New neurological symptoms after major spinal trauma
These may indicate cauda equina syndrome, spinal infection, or serious nerve compression and require immediate emergency medical assessment.
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🔹 High-Yield Points
➟ Sciatica commonly results from lumbar nerve-root irritation or compression
➟ Lumbar disc herniation is a frequent cause
➟ Classic symptom: Radiating pain from the buttock down one leg
➟ L4, L5, and S1 nerve roots are commonly involved
➟ Straight-leg raise test may support the diagnosis
➟ Conservative management is effective for most uncomplicated cases
➟ MRI is reserved for selected patients with concerning or persistent symptoms
➟ Bladder dysfunction, saddle anaesthesia, and progressive weakness are emergency warning signs
Medical disclaimer: This note is for education only and is not a substitute for professional medical advice, diagnosis, or treatment.
- Copied from Medina Z academy
