Nerve root injection
A nerve root injection is a targeted spinal injection used to reduce inflammation and relieve pain caused by irritation of a spinal nerve, often in the neck or lower back.
It is commonly used to treat symptoms such as sciatica or arm pain and may also help confirm the source of symptoms.
AT A GLANCE
- Targeted injection around an irritated spinal nerve
- Used for sciatica and nerve-related arm or leg pain
- Helps reduce inflammation and relieve pain
- May assist in confirming the source of symptoms
- Usually performed as a day-case procedure
Understanding nerve root injection
Targeted treatment for nerve-related pain
A nerve root injection is a precise treatment used to deliver medication directly around a spinal nerve that is inflamed or irritated.
The injection usually contains a combination of local anaesthetic and steroid. The anaesthetic may provide short-term relief, while the steroid works over time to reduce inflammation around the nerve.
At Total Spine Health, nerve root injections are used both as a treatment and as a diagnostic tool, helping to clarify whether a particular nerve is responsible for symptoms.
What is a nerve root injection?
Delivering medication directly to the affected nerve
A nerve root injection involves placing a fine needle near the affected spinal nerve under imaging guidance, usually using X-ray or ultrasound.
Once in position, medication is injected around the nerve to reduce inflammation and irritation. This can help relieve pain and improve function.
Because the injection is targeted, it focuses treatment on the area most likely to be causing symptoms, rather than affecting the whole body.
When this treatment may be used
Situations where a nerve root injection may be appropriate
Nerve root injections may be considered when symptoms suggest irritation or compression of a spinal nerve.
- sciatica causing leg pain
- arm pain related to nerve irritation in the neck
- numbness or tingling in the arm or leg
- nerve-related pain not improving with physiotherapy or medication
- symptoms where the exact source of pain needs to be confirmed
- persistent pain affecting daily activity or sleep
The decision to proceed is based on symptoms, examination findings and imaging results.
CONDITIONS TREATED
Spinal conditions where nerve root injections may be used
Nerve root injections are commonly used to treat conditions involving irritation or compression of spinal nerves.
When a nerve root injection may be considered
When this treatment becomes part of management
Nerve root injections are usually considered when symptoms have not improved with initial non-surgical treatment or where further clarity is needed about the source of pain.
They are often used as part of a wider treatment plan rather than as a standalone solution.
- pain persists despite physiotherapy or medication
- nerve-related symptoms are affecting daily life
- imaging suggests nerve compression
- symptoms are limiting activity or sleep
- diagnosis needs to be confirmed before further treatment
- surgery is being considered and more information is needed
ASSESSMENT AND SURGICAL PLANNING
Careful assessment before injection is recommended
Before proceeding with a nerve root injection, a detailed assessment is carried out to ensure that the treatment is appropriate and targeted correctly.
This helps maximise the benefit of the injection and avoid unnecessary procedures.
- review of symptoms and their pattern
- physical examination and nerve assessment
- review of MRI or other imaging
- identification of the likely nerve involved
- discussion of expected benefits and limitations
- consideration of alternative treatment options
The injection is only recommended where there is a clear rationale for targeting a specific nerve.
PROCEDURES AND TECHNIQUES
How a nerve root injection is performed
Nerve root injections are usually performed as a day-case procedure in a controlled clinical environment. The procedure is carried out using imaging guidance to ensure accurate placement of the needle and medication.
A fine needle is guided accurately towards the affected nerve using X-ray or other imaging.
The area is numbed to improve comfort during the procedure.
Anti-inflammatory medication is delivered around the irritated nerve root.
The procedure is usually completed without the need for an overnight stay.
Patients are monitored afterwards and given advice before going home.
Recovery after nerve root injection
What recovery may involve
Recovery after a nerve root injection is usually straightforward. Some patients notice immediate relief due to the local anaesthetic, although this may wear off before the steroid begins to take effect.
The full benefit of the injection may take several days to develop.
- mild soreness at the injection site may occur
- temporary relief from local anaesthetic is common
- steroid effect develops over several days
- gradual return to normal activity is encouraged
- follow-up may be arranged to assess response
- further treatment may be considered depending on outcome
The response to the injection can help guide future treatment decisions.
FAQs
Frequently asked questions about nerve root injections
Is the injection painful?
Some discomfort may be felt during the procedure, but it is usually well tolerated and performed under local anaesthetic.
How long does it last?
Relief varies between individuals. Some patients experience weeks or months of improvement, while others may have a shorter response.
Is it a cure?
The injection is not a cure but can help reduce inflammation, relieve symptoms and support recovery.
Are there risks?
Risks are generally low but can include infection, bleeding or temporary worsening of symptoms. These are discussed before the procedure.
Can the injection be repeated?
In some cases, injections may be repeated if helpful, although this is considered carefully as part of an overall treatment plan.
