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Spine Pain Injections and Nerve Blocks

An injection is one option for back, neck or leg pain. It can reduce pain, and sometimes it helps show where the pain is coming from. It does not fix every cause of pain, and it is not the right choice for every patient.

Injections that may be considered

  • Nerve root block or epidural injection for pain travelling down the arm or leg
  • Facet joint or medial branch block for back or neck pain from the small spinal joints
  • Sacroiliac joint injection for pain at the lower back and buttock
  • Trigger point injection for painful muscle knots

Radiofrequency treatment

  • Heat from a fine probe is used to reduce the signal of a small nerve carrying joint pain
  • Usually considered after a diagnostic block has shown the likely pain source
  • Relief varies between patients and may not be permanent
  • Suitable for selected patients only

When an injection is not enough

  • Weakness that is getting worse, or loss of bladder or bowel control
  • Severe nerve compression on MRI that explains the symptoms
  • Spinal instability, fracture or infection
  • Pain with fever, weight loss or a history of cancer
Treatment planning

How the decision is made

Dr Yee looks at your symptoms, examination and MRI together before suggesting an injection. The aim is to reduce pain so that you can move and recover, or to confirm the pain source before choosing the next step. Medication, physiotherapy and observation are considered first or alongside.

This page is for education only. A treatment plan requires consultation, clinical examination, and imaging review. If you have sudden weakness, severe headache, loss of consciousness, seizure, or loss of bladder/bowel control, please go to the Emergency Department immediately.
FAQ

Common questions

Does an injection fix a slipped disc?

No. It may calm an irritated nerve and reduce pain, which can give time for recovery. It does not remove disc material, and the pain can return.

How long does the relief last?

It varies. Some patients have relief for weeks to months, and some have little benefit. It cannot be promised in advance.

What are the risks?

Risks include a temporary pain flare, bleeding, infection, allergic reaction, headache after an epidural injection, and, rarely, nerve injury. Steroid can raise blood sugar for a few days in patients with diabetes. These are discussed before the procedure, including whether you take blood thinners.

Is the injection done under X-ray?

Selected injections are done with imaging guidance so the needle position can be confirmed. The choice depends on the site being treated.

Clinical context

What to expect

An injection is planned after consultation. It is not usually done on the first visit unless the examination and imaging already point clearly to one source.

What to bring

  • MRI images and report, and any X-rays or nerve tests
  • A list of your medicines, especially blood thinners such as aspirin, clopidogrel, warfarin or apixaban
  • Your allergy history and diabetes readings, if relevant
  • Details of any previous injections and how long they helped

After the injection

  • Rest for the rest of the day and return to light activity as advised
  • Pain may be slightly worse for a day or two before it settles
  • Contact the clinic or go to the Emergency Department for fever, new weakness, severe headache, or redness, swelling or discharge at the injection site
  • Physiotherapy is often most useful while pain is reduced

An injection treats pain. It does not treat the cause, such as a narrowed canal or a disc bulge. That is why Dr Yee reviews the scan and the examination together, and explains what the injection can and cannot do before you decide.

Appointment

Request a neurosurgical assessment

For non-emergency appointment requests at KPJ Damansara Specialist Hospital, patients or family members may contact the clinic team through WhatsApp or the appointment form.