Nerve Root Block
What is a Nerve Root Block?
A Nerve Root Block is a targeted injection used to diagnose and treat pain originating from a specific nerve in the spine. It involves the precise delivery of a combination of local anaesthetic and steroid to the affected nerve, helping to reduce inflammation and alleviate pain.
This procedure is commonly performed under live X-ray guidance (fluoroscopy) to ensure accurate placement of the injection. It is a minimally invasive treatment option for patients experiencing nerve-related pain due to conditions such as sciatica, spinal stenosis, herniated discs, or nerve irritation.
Who Can Benefit from a Nerve Root Block?
Nerve root blocks are recommended for patients experiencing:
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Radiating pain from the spine into the arms or legs (e.g., sciatica or brachialgia).
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Numbness, tingling, or weakness due to nerve compression.
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Persistent nerve pain that has not responded to physiotherapy or medication.
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Diagnostic purposes – To confirm whether a specific nerve is the source of pain before considering further treatment options.
What to Expect During the Procedure
Before the Injection:
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The procedure is usually performed under local anaesthetic, so you will be awake but comfortable.
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A doctor will explain the risks and benefits and answer any questions you may have.
During the Injection:
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You will lie down on an X-ray table.
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The skin around the injection site will be cleaned and numbed with a local anaesthetic.
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Using live X-ray guidance (fluoroscopy), a fine needle is carefully inserted to the targeted nerve root.
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A contrast dye may be used to confirm the correct placement before the anaesthetic and steroid are injected.
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The procedure usually takes around 15 minutes.
After the Injection:
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You will be monitored for a short time and then allowed to go home.
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Most patients experience some immediate temporary numbness due to the local anaesthetic.
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It is recommended that you arrange for someone to drive you home.
Recovery & Aftercare
- Pain Relief: Some patients experience immediate pain relief, while for others, the steroid may take a few days to take full effect.
- Activity Restrictions: Light activity can be resumed the same day, but avoid heavy lifting and strenuous activities for at least 24–48 hours.
- Side Effects: Mild soreness at the injection site is normal. Rarely, temporary weakness or numbness in the affected limb may occur but should resolve within a few hours.
- Follow-Up: If effective, the injection may be repeated after a few months if symptoms return. If pain persists, other treatment options may be discussed.
How Long Do the Effects Last?
The duration of pain relief varies from patient to patient. Some may experience indefinite relief where as some may only gain short term relief. It can take up to 4 weeks for the injection to improve your symptoms.
Expert Care at Thames Spine
At Thames Spine, Consultant Spinal Surgeon Mr. Daniel Rolton specialises in precise, image-guided spinal injections to help patients manage nerve-related pain effectively. If you are struggling with persistent back or nerve pain, a Nerve Root Block may be a suitable treatment option.
Contact Thames Spine today to book a consultation and discuss your pain management plan.