Sciatica Treatment Bangkok | Dr. Chaidej Sasomboon — Sciatica Specialist Thailand

What is Sciatica?

Sciatica is not a diagnosis — it is a symptom. The term describes pain that radiates along the path of the sciatic nerve: from the lower back, through the buttock, down the back of the leg, and into the foot. The sciatic nerve is the longest and thickest nerve in the body, formed from the nerve roots at L4, L5, S1, S2, and S3 in the lower lumbar and sacral spine.

When one or more of these nerve roots are compressed or irritated — most commonly by a lumbar disc herniation or spinal stenosis — the characteristic shooting, burning, or electric pain of sciatica results. True sciatica is neurogenic (nerve-related) and is distinct from referred musculoskeletal pain, piriformis syndrome, and vascular claudication, which can mimic sciatica.

At Bangkok International Hospital, Dr. Chaidej Sasomboon diagnoses and treats all causes of sciatica, from conservative management through to minimally invasive endoscopic surgery when required.

What Causes Sciatica?

The most common causes of sciatica in order of frequency:

• Lumbar disc herniation (most common — approximately 90% of cases): The inner disc material (nucleus pulposus) herniates through a tear in the outer ring (annulus fibrosus) and presses against the L4, L5, or S1 nerve root. The chemical irritation from nucleus pulposus contact with the nerve produces intense inflammation and pain, even with relatively small herniations. Most common levels: L4-L5 (affecting L5 nerve root) and L5-S1 (affecting S1 nerve root)
• Lumbar spinal stenosis: Narrowing of the spinal canal or lateral recesses due to degenerative changes (thickened ligamentum flavum, facet joint arthritis, disc bulge) compresses nerve roots dynamically — typically causing bilateral symptoms and neurogenic claudication
• Spondylolisthesis: Forward slipping of a vertebra stretches and compresses the exiting nerve root, causing unilateral or bilateral sciatica — commonly at L5-S1
• Foraminal stenosis: Bony narrowing of the neural foramen (nerve exit channel) compresses the nerve root as it exits — often from osteophyte (bone spur) formation at the facet joint or disc space
• Piriformis syndrome: The sciatic nerve passes near or through the piriformis muscle in the buttock — piriformis spasm or hypertrophy can compress the nerve, causing buttock and leg pain without lumbar pathology (rare)
• Sacroiliac joint dysfunction: Inflammation of the SI joint can refer pain into the buttock and leg — often confused with true sciatica
• Tumours or infection: Rare causes — spinal cord tumours, vertebral infection (discitis), epidural abscess, or nerve sheath tumours can compress nerve roots

Which Nerve Root? Specific Sciatica Patterns

• L4 nerve root (L3-L4 disc): Pain and numbness into the front of the thigh and medial lower leg; quadriceps weakness; reduced knee reflex
• L5 nerve root (L4-L5 disc — most common): Pain and numbness along the outer leg and into the top of the foot and big toe; weakness of ankle dorsiflexion and great toe extension (foot drop if severe); no reflex change
• S1 nerve root (L5-S1 disc — second most common): Pain along the back of the leg into the heel, sole, and outer two toes; calf weakness; reduced Achilles reflex

Sciatica Symptoms

• Radiating leg pain: The cardinal symptom — burning, shooting, stabbing, or electric pain that travels from the lower back through the buttock and down the leg. The leg pain is often more severe than the back pain itself
• Numbness and tingling: In a dermatomal distribution corresponding to the compressed nerve root — commonly in the outer leg, sole of the foot, or specific toes
• Muscle weakness: Ankle dorsiflexion weakness (L5), calf weakness (S1), quadriceps weakness (L4) — significant weakness is a red flag requiring urgent evaluation
• Pain worse with sitting: Disc herniations typically hurt more with sustained sitting (increases disc pressure) and improve with walking or lying flat
• Pain worse with coughing or sneezing: Valsalva manoeuvre increases intradiscal pressure and worsens nerve root pain — characteristic of disc herniation
• Positive straight leg raise (SLR): Lifting the straight leg while lying on the back reproduces the leg pain — a clinical sign of nerve root tension from disc herniation
• Cauda equina syndrome (emergency): Bilateral leg weakness, saddle area numbness, and loss of bladder or bowel control — requires urgent surgical decompression within hours

Diagnosing the Cause of Sciatica

• MRI Lumbar Spine: The investigation of choice — identifies the herniated disc, which nerve root is compressed, and the degree of compression. MRI images can be sent to Dr. Chaidej via email at BH******@*************AL.COM for a remote assessment before travelling to Bangkok
• CT Scan: Better for bony detail — useful when MRI is inconclusive or contraindicated, or for foraminal stenosis from osteophytes
• Nerve Conduction Study / EMG: Objectively quantifies nerve root dysfunction and confirms which level is affected — particularly useful when MRI shows multiple potential causes
• Clinical examination: Straight leg raise, crossed straight leg raise, neurological assessment (reflexes, power, sensation) — guides correlation between imaging findings and clinical significance

Conservative Treatment for Sciatica

The majority of sciatica episodes from disc herniation resolve with conservative management over 6–12 weeks. Natural resorption of the herniated disc material (the body’s immune cells gradually remove the herniated fragment) accounts for most spontaneous recoveries:

• Activity modification and relative rest: Avoiding prolonged sitting and heavy lifting during the acute phase; walking is generally better tolerated than sitting and should be encouraged
• NSAIDs and analgesia: For acute pain relief — ibuprofen, naproxen, or diclofenac reduce nerve root inflammation
• Neuropathic agents: Pregabalin (Lyrica) or gabapentin for burning, shooting, or electric-quality nerve pain that doesn’t respond to NSAIDs
• Physiotherapy: McKenzie method, nerve mobilisation (neural flossing), core stability — reduces recovery time and prevents recurrence
• Transforaminal epidural steroid injection: Fluoroscopy-guided or CT-guided injection of corticosteroid directly around the compressed nerve root — provides the most rapid and effective conservative relief (typically 60–80% response rate); bridges to natural resolution without surgery in many patients
• Oral steroids: Short course of dexamethasone or methylprednisolone for severe acute radiculopathy — reduces inflammation quickly but effect is short-lived

Surgery is appropriate when: sciatica fails to improve after 6–12 weeks of conservative treatment; progressive neurological deficit is occurring; pain is intractable and severely impairs quality of life; or cauda equina syndrome develops (surgical emergency).

Surgical Treatment for Sciatica in Bangkok

Endoscopic Discectomy (Smallest, Fastest Recovery)

For lumbar disc herniation — the most common cause of sciatica — endoscopic discectomy is the least invasive surgical option available. Through a single incision of less than 1 cm, a pencil-thin endoscope is passed to the herniated disc under local or spinal anaesthesia. The herniated fragment compressing the nerve root is removed under direct high-definition visualisation:

• Incision: less than 1 cm
• Anaesthesia: local (with sedation) or spinal
• Operating time: 45–90 minutes
• Hospital stay: 24 hours (same-day or next-day discharge)
• Walking: same day
• Success rate: 85–92% excellent leg pain relief
• Return to work: desk work within 1–2 weeks

Microdiscectomy (Gold Standard)

Through a 2–3 cm incision and with operating microscope magnification, the herniated disc fragment is precisely removed while preserving all healthy disc tissue. Microdiscectomy remains the international gold-standard for lumbar disc herniation causing sciatica, with over 90% success rates in published trials (SPORT trial, Weber trial):

• Hospital stay: 1–2 nights
• Return to desk work: 2–3 weeks
• Return to physical work: 6–8 weeks

Endoscopic Decompression for Stenosis-Related Sciatica

When sciatica results from spinal stenosis rather than disc herniation, endoscopic or microscopic laminectomy/laminotomy removes the compressing bone and thickened ligament through minimally invasive approaches — relieving the leg pain of neurogenic claudication.

Dr. Chaidej Sasomboon — Sciatica Specialist Bangkok

Dr. Chaidej Sasomboon (นพ.ชัยเดช สระสมบูรณ์) has treated thousands of patients with sciatica at Bangkok International Hospital. His approach:

• Accurate diagnosis first: Not all leg pain is sciatica — Dr. Chaidej carefully examines every patient and correlates MRI findings with clinical signs to identify the true pain generator before recommending any treatment
• Conservative treatment exhausted first: Unless there is neurological emergency or intractable pain, conservative options including guided epidural injections are offered before surgery
• Least invasive surgical option: When surgery is indicated, the smallest effective approach is always chosen — endoscopic discectomy when anatomy permits, microdiscectomy as the reliable standard

What to Expect: Sciatica Surgery Journey in Bangkok

1. Telemedicine consultation: Send your MRI to BH******@*************AL.COM — receive a recommendation (conservative vs surgical, which technique) within 2–3 business days via video call
2. Arrival in Bangkok: Pre-operative blood tests and anaesthetic review on Day 1
3. Surgery: Day 2–3 — endoscopic or microscopic discectomy, 1–2 hours under general or spinal anaesthesia
4. Recovery: Walk same or next day; discharge within 24–48 hours
5. Physiotherapy: Begins Day 1 post-op — walking programme, neural mobilisation
6. Return home: 7–10 days after endoscopic discectomy; 10–14 days after microdiscectomy
7. Remote follow-up: Video consultation at 2 weeks and 6 weeks; X-rays can be done locally and emailed

Frequently Asked Questions about Sciatica Treatment

How long does sciatica last without treatment?

The majority of sciatica episodes from acute disc herniation improve within 6–12 weeks with conservative management. However, approximately 10–20% of patients develop chronic sciatica that persists beyond 3 months. If sciatica has lasted more than 6 weeks without improvement, or if there is neurological weakness, early surgical consultation is appropriate to prevent permanent nerve damage.

Is surgery the only cure for sciatica?

No — most sciatica resolves without surgery. The majority of patients with lumbar disc herniation improve with conservative management: rest, anti-inflammatory medication, physiotherapy, and if needed, epidural steroid injections. Surgery is reserved for cases where conservative treatment fails, where there is neurological deterioration, or where the severity of pain is unacceptable. Surgery does not “cure” the underlying disc degeneration — it relieves the nerve compression, allowing the nerve to recover.

What is the fastest way to relieve sciatica pain?

For acute severe sciatica, the fastest conservative relief is usually a transforaminal epidural steroid injection — directly targeting the inflamed nerve root. This can provide significant relief within 48–72 hours. Oral steroids (dexamethasone) can also reduce inflammation rapidly. For mechanical relief, lying flat or on the side with a pillow between the knees often reduces disc pressure on the nerve. Avoiding prolonged sitting is critical.

Can sciatica cause permanent nerve damage?

Severe, prolonged nerve root compression can cause permanent damage — including persistent numbness, chronic weakness, and in the worst cases, foot drop (inability to lift the foot). This is most likely when there is a large disc herniation with complete nerve root compression, or when cauda equina syndrome is present. Early decompression (within 4–6 weeks for progressive weakness, immediately for cauda equina) significantly reduces the risk of permanent deficit.

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