Facet Joint Injections and Medial Branch Nerve Blocks

Wessex Pain Clinic

Facet Joint Injections and Medial Branch Nerve Blocks

Facet joint injections and medial branch nerve blocks are procedures used to diagnose and manage pain arising from the small joints of the spine. These joints — known as facet joints — can become inflamed or arthritic, leading to pain in the neck, back, or referred areas such as the head, shoulders, or buttocks.
These treatments are

consultant-led and performed under X-ray or ultrasound guidance for accuracy and comfort.

How the Procedure Works

Facet joints are pairs of small joints at each level of the spine that help with movement and stability. Over time, they can develop wear and tear (facet joint arthritis), inflammation, or strain — a common cause of ongoing spinal pain.

There are two main approaches to treating this type of pain:

Facet Joint Injections: These involve injecting a combination of local anaesthetic and steroid directly into one or more facet joints to reduce inflammation and provide temporary relief.

Medial Branch Nerve Blocks: Instead of injecting into the joint, this approach targets the medial branch nerves — the small nerves that supply sensation to the facet joints. Local anaesthetic and steroid is placed near these nerves to interrupt the pain signals. If this block significantly reduces your pain, it confirms the facet joint as the pain source. The duration of benefit varies, from short lived, to much longer. If the benefit is significant but not as longer than hoped, radiofrequency denervation can be offered, whereby these nerves are targeted with a needle that applies electricity to heat up and destroy them. The aim here is to provide much longer lasting relief.

Wessex Pain Clinic

What Conditions It Can Help With

These procedures are typically used for:

Neck pain or back pain due to spinal arthritis
Pain that worsens with twisting, bending, or prolonged standing
Localised stiffness and aching in the cervical, thoracic, or lumbar spine
Suspected facet joint pain following injury or strain
Postural or mechanical back pain that does not respond to other treatments
Medial branch blocks are primarily diagnostic, helping determine whether longer-term treatments such as radiofrequency ablation (RFA) may be suitable. However many get meaningful relief from medial branch blocks, and many people do not need to go on and have radiofrequency denervation.

Aimed Benefits

These injections aim to:
Confirm whether the facet joints are the cause of your pain (diagnostic clarity)
Provide pain relief
Improve mobility and function
Support physiotherapy and movement-based rehabilitation
If a medial branch block provides significant pain relief, your consultant may recommend Radiofrequency Ablation (RFA) — a longer-lasting treatment that uses heat to interrupt the medial branch nerves’ ability to transmit pain.

What to Expect

Both types of injections are performed as outpatient procedures and usually take 20–30 minutes. You’ll lie in a comfortable position and the skin will be numbed. Using live imaging x-ray, your consultant will guide a fine needle to the targeted joint or nerve.

Most people are able to go home the same day and return to light activity within a day or two.

Risks and Considerations

All procedures carry some risks, which will be discussed in detail with you during your consultation. You will have the opportunity to ask questions, and formal consent will always be obtained before any procedure is carried out.

Combined Approach / Multidisciplinary Care

At Wessex Pain Clinic we find that the best results come from combining medical treatments with active rehabilitation. Procedures are often most effective when paired with physiotherapy, movement-based exercise, and — where appropriate — psychological support. This comprehensive approach addresses both the physical and emotional aspects of pain and supports longer-term improvement.

Key Points Summary

  • Consultant-led procedures targeting facet joint pain
  • Injections may be placed into the joint or the supplying nerve
  • Medial branch blocks are used to confirm suitability for radiofrequency ablation
  • Outpatient treatments with low recovery time
  • Work best when paired with movement and rehabilitation

Disclaimer

Results vary between individuals and cannot be guaranteed. Your consultant will discuss whether this procedure is appropriate for you.

At Wessex Pain Clinic, we work as a team and meet regularly to discuss complex, treatment resistant or unusual cases. As such you will often receive the expertise of several pain consultants. We believe that we are one of very few pain clinics to offer this.

Driving advice: You should not drive that day if receiving any sedation. Our procedures do vary on whether they are possible to drive home from yourself, please seek advice from your consultant about driving advice. If you are seeing us for an injection and planning on driving, please check with us beforehand about whether it will be possible to drive yourself home afterwards. Wessex Pain Clinic provides consultant-led assessment and treatment for acute and chronic pain conditions. Our multidisciplinary team includes Consultant Pain Specialists, Physiotherapists and Psychologists, offering evidence-based interventions alongside rehabilitation and self-management support. We welcome patients from across Hampshire, Dorset, Wiltshire, Surrey and Sussex, including Winchester, Basingstoke, Southampton, Portsmouth, and Chichester – with both in-clinic appointments and remote consultations available across the wider Wessex region.