Nerve Block Injections

The Two Purposes of Nerve Block Injections

Nerve block injections serve two broad purposes.

1. Relieving Pain (Therapeutic Purpose)

The goal is to temporarily ease your pain.

• A local anesthetic is injected to block pain signals from reaching your brain
• The relief period is often used as a window to move forward with exercise therapy
• This approach is commonly used in pain management clinics

Think of it as a "bridge" treatment:

Because the effects are temporary, the most practical approach is: "Use the injection to reduce pain, then use that pain-free window to strengthen your body through exercise." Rather than relying on injections alone, combining them with exercise therapy is essential.

2. Identifying the Source of Pain (Diagnostic Purpose)

In spinal stenosis, age-related changes (wear and tear) often occur at multiple levels of the spine. When an MRI shows narrowing at several locations, the challenge is figuring out which level is the main culprit.

By injecting a specific nerve and seeing whether the pain goes away, your doctor can confirm: "This nerve is the one causing the problem." If surgery is being considered, this information is critical for deciding exactly where to operate.

Diagnostic nerve blocks are commonly used by spine surgeons when planning a surgical approach.