Image-guided spinal injection
An injection of local anaesthetic, usually with steroid, placed precisely around an irritated spinal nerve or joint using X-ray or CT guidance, mainly to ease nerve-related leg or arm pain for a time as part of a wider plan.
✓ Medically reviewed by a GMC-registered consultant · last reviewed September 2026 · next review September 2027 · how we review
In short
- It is a precisely placed injection, usually of local anaesthetic and steroid, around a spinal nerve or joint, guided by X-ray or CT to ease nerve-related pain.
- Relief is often partial and temporary (weeks to a few months) and it is not a cure — it works best as part of a plan with exercise and physiotherapy.
- NICE does not recommend spinal injections for ordinary low back pain without leg symptoms; they are mainly for nerve-related (radicular) pain such as sciatica.
- It is a needle procedure under local anaesthetic, but serious problems can rarely happen, so urgent warning signs and a follow-up plan matter.
A plain-English summary. The detail — including risks and recovery — is below.
At a glance
A general guide. Your radiologist will give you advice for your situation.
Can reduce nerve-related leg or arm pain for a period, sometimes substantially
Your main problem is ordinary low back pain without leg pain, where NICE does not recommend spinal injections.
Your leg or arm may feel numb or weak from the local anaesthetic; this wears off. Rest, do not drive, and have someone with you if possible.
A clear plan to review how much and how long the injection helped.
Your leg or arm may feel numb or weak from the local anaesthetic; this wears off. Rest, do not drive, and have...
Your usual pain may briefly feel worse before it eases. Simple pain relief and gentle movement usually help. The...
Any steroid effect typically builds over this time. Keep a simple note of your pain levels and what you can now...
If it helps, this is the time to push on with exercise and physiotherapy while pain is lower. The benefit may fade...
What is an image-guided spinal injection?
An image-guided spinal injection places medicine — usually local anaesthetic, often combined with a steroid — precisely around an irritated nerve, into the space around the spinal nerves (epidural), or into a small spine joint (facet joint). An interventional radiologist or pain specialist uses X-ray (fluoroscopy) or CT pictures to guide the needle to exactly the right spot.
It is used mainly to reduce pain that travels down a leg or arm because a spinal nerve is being pressed or irritated — for example sciatica from a disc problem. A 'nerve root block' can also help work out which nerve is causing the pain. Facet joint injections target pain thought to come from the small joints of the spine.
It is important to be realistic about what these injections can and cannot do. They often give relief that is partial and temporary — weeks to a few months — rather than a cure. They are best thought of as one part of a plan that also includes staying active, exercise and physiotherapy, and sometimes as a way to get you moving so that rehabilitation can work. NICE advises that spinal injections should not be used for ordinary low back pain without leg pain (sciatica); they have a place mainly in nerve-related pain.
The injection is given through a needle (a skin puncture, not a cut) after the skin is numbed.
Types, options & approaches
There may be different ways to do this. The right approach depends on the clinical question and your circumstances.
What a spinal injection can and cannot do
| Aim | Realistic expectation |
|---|---|
| Ease nerve-related leg/arm pain | Often helps for a time; effect may be partial and temporary |
| Cure the underlying problem | No — it does not fix a disc, narrowing or arthritis |
| Help you get moving and rehabilitate | Can create a window to do exercise and physiotherapy |
| Treat plain low back pain (no leg pain) | Not recommended by NICE for this |
| Identify the painful nerve | A nerve root block or medial branch block can help with this |
An injection is usually one step in a plan, not a stand-alone fix. Ask what it is meant to achieve for you and what happens next whether or not it helps.
Preparing for your procedure
- Bring your recent scans (such as an MRI) and a clear description of where your pain is and what it stops you doing.
- Tell the team about allergies, diabetes (steroids can raise blood sugar for a few days), and any infection.
- Tell them about blood-thinning medicines (such as warfarin, apixaban or clopidogrel), which usually need to be managed before a spinal injection.
- Let them know if you might be pregnant, as X-ray and CT use radiation.
- If sedation is planned, follow fasting instructions and arrange someone to take you home.
- Do not plan to drive yourself home, and ideally arrange help for the rest of the day.
- Agree beforehand what the injection is meant to achieve and how the result will be reviewed.
What happens
You usually lie face down (or on your side) on an X-ray or CT couch. The skin over your spine is cleaned and numbed with local anaesthetic. Using live X-ray or CT pictures, the specialist guides a fine needle to the precise target — the epidural space, a nerve root, or a facet joint. A small amount of contrast dye may be injected first to confirm the needle is in exactly the right place.
The medicine — local anaesthetic, usually with a steroid — is then injected. You may feel pressure, a brief reproduction of your usual pain, or a warm sensation. The needle is removed and a small dressing applied. The injection itself usually takes around 15 to 30 minutes.
Afterwards you rest and are watched for a short time. Your leg or arm may feel numb or weak for a few hours from the local anaesthetic, which then wears off. Staff will explain what to expect, when any steroid effect may begin, and how to keep a simple record of your pain so the result can be judged.
Is this procedure right for me?
A good consultation should explore whether it's the right choice for you now — including reasons to wait or consider something else.
May not be suitable if…
- Your main problem is ordinary low back pain without leg pain, where NICE does not recommend spinal injections.
- There is infection near the injection site or in the bloodstream.
- A bleeding tendency or blood-thinning medicine cannot be safely managed.
- Red-flag features (such as new bladder or bowel problems, leg weakness, or suspected serious cause) mean urgent assessment, not an injection.
Delay or rearrange if…
- You have an active infection or unexplained fever.
- Blood-thinning medicines have not been managed as advised.
- Your blood sugar is poorly controlled and you have diabetes (steroids can raise it).
- There is a chance you are pregnant and the procedure uses X-ray or CT.
- You have not yet tried, or cannot access, exercise and physiotherapy that should usually come first.
Alternatives to discuss
- Staying active, structured exercise and physiotherapy as first-line care.
- Pain-management approaches and, where appropriate, medicines reviewed by your clinician.
- Watchful waiting, as many episodes of sciatica settle over weeks to months.
- Radiofrequency denervation in selected facet-related pain, or a surgical opinion for severe or persistent nerve compression.
Before you decide
Use this as a shared-decision checklist. The aim is not just “can this be done?”, but whether it is right for you, now, with the risks and alternatives clearly understood.
What matters most to me?
Think about symptoms, daily life, work, caring responsibilities, sport, fertility, travel, appearance and anxiety — the right choice depends on your priorities, not just the medical facts.
What are all my options?
Ask about waiting, monitoring, medicines, rehabilitation, a smaller or larger procedure, a different test, NHS referral, or a second opinion where that would help.
What would make me pause?
Active infection, pregnancy, unstable medical problems, smoking, medicines that increase bleeding, poor support at home, or feeling pressured are all reasons to slow down and get tailored advice.
What happens if I do nothing today?
For some problems, waiting is safe; for others, delay can make treatment harder. A good consultation should explain the trade-off in plain English.
Comfort, sedation or contrast choices
If local anaesthetic, sedation, contrast or pain relief is used, ask what is planned, why, and what it means afterwards.
Benefits
- Can reduce nerve-related leg or arm pain for a period, sometimes substantially
- May create a window of better pain control to do exercise and physiotherapy
- Can help confirm which nerve or joint is causing the pain
- May delay or avoid the need for surgery in some people
- Targeted, image-guided placement means the medicine reaches the intended spot
Risks & complications
- Temporary increase in pain for a day or two before any improvement
- Soreness or bruising at the injection site
- Numbness or weakness in the leg or arm for a few hours from the local anaesthetic
- A short-lived rise in blood sugar (especially if you have diabetes) or facial flushing from the steroid
- No benefit at all, or only brief relief
- Headache, particularly if the lining around the spinal cord is breached
- Temporary disturbance of periods, or sleep and mood changes, from the steroid
- A small drop in blood pressure or feeling faint during the procedure
- Infection around the spine (such as an abscess), which can be serious
- Bleeding around the spine causing pressure on nerves
- Lasting nerve injury or, very rarely, weakness or loss of bladder or bowel control
- An allergic reaction to the medicines or contrast dye
Serious complications are rare, but because the injection is near the spine and its nerves they need respect. Tell the team straight away about blood thinners, infection or diabetes. The biggest practical limitation is that relief is often temporary and may not happen at all, so it should be part of a wider plan rather than the whole answer. Ask what the plan is if the injection helps a lot, a little, or not at all.
Published figures to discuss
How well a spinal injection works varies a lot with the cause of the pain, the type of injection and how it fits with rehabilitation. Many people get partial, temporary relief; some get none. Serious complications are rare but more likely if blood thinners or infection are not managed. Reliable, generalisable percentages are limited, so the wording here is deliberately cautious.
| Figure | Reported range | How to interpret it | Source / confidence |
|---|---|---|---|
| Serious nerve injury | Extremely rare; NHS pain-procedure leaflets often quote less than 1 in 10,000 | New weakness, numbness, bladder or bowel symptoms after injection need urgent assessment. | NHS — Sciaticanhs.ukPublished figure |
| Infection or bleeding around the spine | Rare but potentially serious | Risk is higher with anticoagulants, immune suppression and diabetes; fever or severe new spinal pain should be reported. | NICE QS155 — Spinal injections (low back pain and sciatica)nice.org.ukSource-linked context |
| Temporary pain flare or numbness | Common in the first days or hours, depending on local anaesthetic and steroid | Do not drive until numbness or weakness has fully worn off. | NICE QS155 — Spinal injections (low back pain and sciatica)nice.org.ukSource-linked context |
| Pain relief being absent or short-lived | Common | Image guidance improves accuracy but cannot guarantee that the target is the true pain generator. | Guide sourcesClinical context |
These are literature figures, not a personalised prediction. Your own risks and likely benefits depend on your circumstances, your health, and how your care is carried out and followed up.
What happens afterwards
There is usually little physical recovery, but you should take it easy for the rest of the day, avoid driving immediately, and expect that any steroid benefit takes time to appear and may be temporary.
- A short-lived flare of your usual pain in the first day or two
- Some numbness or heaviness in the leg or arm for a few hours
- Mild soreness or bruising at the injection site
- A gradual, sometimes partial, change in pain over the following days rather than instant relief
Aftercare
- Rest for the remainder of the day and avoid driving until any numbness or weakness has fully gone.
- Take simple pain relief as advised if your pain briefly flares.
- Keep the small dressing clean and dry for the first day.
- If you have diabetes, check your blood sugar more closely for a few days, as steroids can raise it.
- Keep a simple pain-and-activity diary so the effect can be judged objectively.
- Continue or restart your exercises and physiotherapy as guided, especially if pain improves.
- Know who to contact, and seek urgent help for the warning signs below.
- Someone to drive you home and ideally stay with you for the day
- Simple pain relief at home
- A pain-and-activity diary to track the effect
- A clear plan for exercise or physiotherapy to use any window of relief
- A review appointment or plan to assess the result
- Knowing the urgent warning signs and who to contact
Scars and how they heal
There is no surgical scar. The injection is given through a needle, leaving only a tiny puncture mark that may bruise slightly and usually fades within days.
⚠ Get urgent help if…
- New or worsening weakness in a leg or arm, or difficulty walking
- Loss of control of your bladder or bowels, or numbness around the back passage or genitals — call 999
- A severe headache, especially when sitting or standing up
- Fever, severe back pain, or redness and discharge at the injection site (possible infection)
- Sudden severe pain, or pins and needles spreading rapidly
- Signs of an allergic reaction such as rash, swelling or difficulty breathing — call 999
Who to contact: your clinician, clinic or test provider first (keep their number to hand). For urgent advice when you can't reach them, call NHS 111. In an emergency, call 999.
General guidance — it doesn't replace the specific advice your radiologist gives you.
Results & realistic expectations
A good result is meaningful pain relief that lets you move and function better, ideally long enough to make real progress with exercise and rehabilitation. Local anaesthetic may help within hours; any steroid effect builds over days. It is important to understand that relief is often partial and temporary and that the injection does not repair the underlying disc, narrowing or arthritis. For some people it gives little or no benefit, and that information is itself useful in planning the next step.
When a spinal injection helps, the benefit often lasts weeks to a few months and may then fade. Some people get a longer settling of symptoms, especially if they use the period of relief to build strength and mobility. Injections are not designed to be repeated indefinitely, and your clinician will weigh up the benefit, the steroid dose over time, and whether other treatments would serve you better.
Related tests, treatments or support
Spinal injections are usually one part of a wider plan that includes staying active, structured exercise and physiotherapy, and good pain management. A diagnostic block (such as a medial branch block) may be combined with, or lead on to, other treatments like radiofrequency denervation in selected people. NICE is clear that injections are not a substitute for self-management and rehabilitation.
Follow-up & long-term care
You should have a clear plan to review how well the injection worked, usually after a few weeks, and to decide the next step. This may be pushing on with rehabilitation, considering a repeat injection in selected cases, exploring other treatments, or a surgical opinion if appropriate. Report new weakness, bladder or bowel problems, severe headache or signs of infection urgently rather than waiting for review.
- Ongoing exercise and physiotherapy to maintain any gains in mobility and strength
- A sensible limit on how often injections are repeated, agreed with your clinician
- Attention to overall back health: activity, weight, posture and pacing
- Review of whether other treatments would help more if injections give only brief relief
Repeat, follow-on and what comes next
- The injection may give little or no relief, which is useful information for the next step.
- Relief is often temporary, and a repeat injection may be considered in selected cases.
- A diagnostic block may lead on to a different treatment such as radiofrequency denervation.
- Persistent or worsening nerve symptoms may prompt a surgical opinion.
Ask what happens if the result is unclear or needs repeating, and what is included if further tests or follow-up are needed.
What good aftercare looks like
- A clear plan to review how much and how long the injection helped.
- Linked exercise and physiotherapy to make the most of any relief.
- Written urgent warning signs (new weakness, bladder or bowel problems, severe headache, infection) and who to contact.
- A sensible, agreed limit on repeat injections and a route to other options if relief is brief.
What affects the cost
Costs vary a great deal between people and providers, and we don't publish prices. What matters is understanding what drives the cost and making sure your quote is complete. The main things that affect it:
- The type of injection (epidural, nerve root block, facet joint, medial branch block)
- Whether X-ray (fluoroscopy) or CT guidance is used
- The specialist's fee and use of an imaging room
- Whether sedation is used and needs monitoring
- Follow-up review to assess the result
- Whether more than one level or side is treated
- The specialist and facility fees for the injection
- The imaging guidance used (X-ray or CT)
- Any sedation and its monitoring
- A follow-up review to judge whether it worked
- What happens, and any cost, if the injection does not help
- Whether the price covers one or more levels/sides
On the NHS? Image-guided spinal injections are available on the NHS for selected nerve-related pain when criteria are met; they are not recommended for low back pain without sciatica, and private access is mainly for speed or choice.
You're entitled to your total cost in writing — including reports, follow-up and what happens if the result is inconclusive — before you decide.
Consent traps and marketing red flags
These are not small details. They are often where patients lose choice, time to reflect, or realistic expectations.
Consent traps
- Implying the injection is a cure rather than often-temporary relief.
- Not explaining that NICE advises against injections for plain low back pain without sciatica.
- No plan for exercise and physiotherapy to use any window of relief.
- Not warning about driving, sedation, diabetes and blood-thinner management.
- No agreed plan for what happens if it helps little or not at all.
Marketing red flags
- Promising a 'usually not painful' or guaranteed cure for back pain.
- Offering repeated injections as a stand-alone treatment without rehabilitation.
- Recommending injections for ordinary low back pain without leg symptoms.
- Not discussing that relief is often partial and temporary, or naming serious warning signs.
Choosing a specialist safely
- Check the radiologist is on the GMC Specialist Register for this area.
- Make sure they work at a CQC-registered service, and look for membership of the relevant Royal College or professional body.
- You're entitled to time to consider and to have your questions answered before you agree — the radiologist who looks after you should explain it, not a salesperson.
- Be wary of pressure: time-limited offers or deposits taken before you've had time to think are red flags, not bargains.
- You're entitled to your total cost in writing — including any follow-up — before you decide.
Questions to ask your medical professional
Take this to your consultation. A good radiologist will welcome every one of these.
- Is my pain coming from a nerve, and is an injection the right step for me?
- What exactly is this injection meant to achieve, and how will we judge if it worked?
- What is the plan if it helps a lot, only a little, or not at all?
- How does this fit with my exercise and physiotherapy, and what should I be doing afterwards?
- How many times might this be repeated, and what are the alternatives?
- What are the urgent warning signs after the injection, and who do I contact?
- Are you on the GMC Specialist Register for this area, and which Royal College or professional body are you a member of?
- Will you be the radiologist who carries out my procedure, and who looks after me afterwards?
- What are the risks for someone like me, and how often do your own patients have a problem or need it repeated or redone?
- What does a realistic result look like — and what can this procedure not achieve?
- What are my options, including waiting, doing nothing for now, or choosing a different approach?
- Can I have written information, results and aftercare instructions in a format I can use, including any accessibility or communication support I need?
- What is the total cost in writing, including any follow-ups, and how much time do I have to decide?
Frequently asked questions
Will the injection cure my back problem?
How long does the relief last?
Why won't I be offered this for my ordinary back pain?
Does the injection hurt?
Can I drive home afterwards?
How many injections can I have?
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How we made this page
Medically reviewed by a GMC-registered consultant. Written in plain English, checked against NHS, NICE, GMC and relevant Royal College / specialist-society guidance, and kept under review. No clinic paid to appear on this page, and we publish no pricing. This is general information to help you prepare — it is not a substitute for advice from your own clinician. How we review our guides →
Source hierarchy: UK regulator and NHS/NICE guidance first, then relevant Royal College or specialist-society guidance, then peer-reviewed evidence for procedure-specific figures where available.
Sources & standards: NICE QS155 — Spinal injections (low back pain and sciatica) NICE NG59 — Low back pain and sciatica in over 16s NHS — Sciatica NHS — Back pain treatment BSIR — What is interventional radiology?
Reviews reflect patients' experience of care, not clinical outcomes. For procedure volumes and outcome data see PHIN.
Last medically reviewed 2026-09-21. Spotted something wrong or out of date? Report an error in this guide.
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