Best evidence · Patient guide
When does sciatica need surgery?
Most sciatica does not require an operation. Surgery may become appropriate when pain or function has not improved with non-surgical care and imaging shows a cause that corresponds with the symptoms.
New bladder or bowel disturbance, saddle numbness or rapidly worsening leg weakness may require emergency spinal assessment. Do not wait for a routine clinic or surgical appointment.
When is a surgical opinion considered?
NICE recommends considering surgery to take pressure off a nerve when non-surgical treatment has not improved pain or everyday function and the MRI shows a cause that matches the sciatica. The decision is not based on the scan alone.
The severity and duration of symptoms, any numbness or weakness, the effect on daily life, progress with treatment and the person’s preferences all matter. Weakness that is getting worse or interfering with walking may justify an earlier surgical discussion.
What operation is usually discussed?
For sciatica caused by a slipped disc, the usual operation is called decompression or discectomy. The surgeon removes the piece of disc or nearby tissue pressing on the nerve.
This operation is mainly intended to improve nerve pain travelling into the leg. Improvement in ordinary back pain is less predictable.
Does surgery work faster?
A 2023 BMJ systematic review found that discectomy can provide faster relief of leg pain for selected people with disc-related sciatica, but the average advantage over non-surgical treatment reduces with time and was negligible in the long term. The certainty of evidence was low or very low.
This makes timing a shared decision: some people prioritise faster relief despite surgical risks, while others prefer to allow more time for recovery when neurological function is stable.
What are the risks?
Risks vary with the operation and individual. They can include infection, bleeding, dural tear and cerebrospinal-fluid leak, nerve injury, persistent symptoms, recurrent disc prolapse and the possibility of further surgery. Anaesthetic and medical risks also require assessment.
A surgical opinion is an opportunity to discuss the likely benefit, alternatives and risks; it does not commit someone to an operation.
What should be in place before referral?
The diagnosis should be clinically credible and relevant MRI findings should correspond with the side and level of symptoms. The record should describe pain, function, neurological findings, treatments tried and the person’s priorities.
Selected people may consider an image-guided nerve-root or epidural injection, but an injection should not delay urgent surgical assessment when neurological deterioration is present.
A balanced specialist assessment
Dr Seyfried provides non-surgical assessment and can help determine whether symptoms and imaging identify a treatable nerve-root problem, whether further conservative care is reasonable, or whether a spinal surgical opinion is appropriate.
Return to the main sciatica guide or read Dr Oliver Seyfried’s clinical credentials.
Common questions
Is severe pain alone an emergency?
Severe pain deserves prompt assessment, but emergency pathways are particularly concerned with bladder or bowel disturbance, saddle numbness, rapidly worsening weakness and other signs of serious pathology.
Do I need to wait a fixed number of weeks?
No single waiting period applies to everyone. Timing depends on neurological function, severity, recovery, imaging, treatment response and informed preference.
Will surgery cure back pain as well as leg pain?
Decompression or discectomy is primarily intended to relieve symptoms from nerve compression. Outcomes for non-specific back pain are less predictable.
Can a disc prolapse come back?
Yes. Recurrent disc prolapse is a recognised risk, although many people do not experience recurrence.
Evidence used
- NICE guideline NG59: recommendations on spinal decompression for sciatica.
- Liu C et al. Surgical versus non-surgical treatment for sciatica: systematic review and meta-analysis. BMJ. 2023;381:e070730.
- NHS: Lumbar decompression surgery.
Written and clinically reviewed by Dr Oliver Seyfried · Published and last reviewed 27 August 2026