Sympathetic Nerve Block

A sympathetic nerve block is a minimally invasive injection used to diagnose and treat pain caused by the sympathetic nervous system.

The sympathetic nervous system controls automatic body functions like blood flow, temperature, and sweating. When these nerves become overactive or dysfunctional, they can contribute to chronic pain conditions.

During the procedure, medication is injected near clusters of sympathetic nerves (called ganglia) to block abnormal pain signals and improve circulation.

What Conditions Does This Treatment Help?

Sympathetic nerve blocks are commonly used to treat:

Complex Regional Pain Syndrome (CRPS)
Chronic nerve (neuropathic) pain
Post-surgical or post-traumatic pain
Circulation disorders (Raynaud’s syndrome)
Chronic abdominal or pelvic pain
Excessive sweating (hyperhidrosis)

Types of Sympathetic Nerve Blocks

Depending on where your pain is located, different types of sympathetic blocks may be used:

Stellate Ganglion Block → for neck, arm, and upper body pain
Lumbar Sympathetic Block → for lower back, leg, and foot pain
Celiac Plexus Block → for abdominal pain

👉 All of these target specific nerve clusters connected to the sympathetic system.

How Does a Sympathetic Nerve Block Work?

Pain signals can travel through the sympathetic nervous system and become overactive in certain chronic conditions.

A needle is placed near the targeted nerve cluster
Local anesthetic (± steroid) is injected
The injection temporarily “turns off” the nerve activity
Pain signals are reduced or interrupted

This can:
✔ Reduce pain
✔ Improve blood flow
✔ Help “reset” abnormal nerve activity

👉 Blocking sympathetic nerves can also shift the body’s balance and reduce inflammation-related pain.

What to Expect During the Procedure

Before the Procedure

Medical evaluation and history review
Instructions on medications and fasting

During the Procedure

Performed under fluoroscopy (X-ray) or ultrasound guidance
Local anesthesia with or without sedation
Needle placed near the targeted ganglion
Medication injected
Procedure takes about 20–40 minutes

After the Procedure

Short observation period
Same-day discharge
Temporary warmth, numbness, or weakness may occur

Benefits of Sympathetic Nerve Block

✔ Minimally invasive, no surgery required
✔ Helps diagnose the source of chronic pain
✔ Can provide meaningful pain relief
✔ Improves circulation and nerve function
✔ May reduce need for medications

👉 Some patients experience relief lasting weeks to months, especially with a series of injections.

Who Is a Good Candidate?

You may be a candidate if you:

Have chronic nerve-related pain
Experience burning, tingling, or temperature changes
Have suspected sympathetic nerve involvement
Have not improved with conservative treatments

👉 These blocks are often used when the exact source of pain needs confirmation.

Risks & Side Effects

Sympathetic nerve blocks are generally safe, but possible risks include:

Temporary soreness or bruising
Warm sensation or weakness
Infection or bleeding (rare)
Nerve injury (very rare)
Specific temporary effects depending on injection site

Serious complications are uncommon when performed by experienced specialists.

When Is This Treatment Recommended?

Sympathetic nerve blocks are typically recommended when:

Pain is suspected to be sympathetically mediated
Conservative treatments have failed
Diagnosis needs confirmation
Patients want a non-surgical treatment option

👉 It is positioned as a mid-level treatment before advanced therapies like neuromodulation

Recovery & Results

Mild soreness for 1–2 days
Immediate relief may occur from anesthetic
Longer relief develops over days to weeks
Relief may last weeks to months

👉 Many patients benefit from a series of injections for sustained results.

FAQs

Is a sympathetic nerve block painful?

Most patients feel minimal discomfort due to local anesthesia.

How long does relief last?

Relief can last from days to months depending on the condition.

Will I need multiple treatments?

Yes, a series of injections is often recommended for best results.

Is this the same as a regular nerve block?

No. This targets the sympathetic (autonomic) nervous system, not just sensory nerves.

Treatment Offered By Kansas Pain Management

Kansas Pain Management offers a comprehensive pain treatment plan that is tailored to each patient’s specific needs. The first step is a thorough evaluation, which includes a medical history, physical examination, and diagnostic testing, if necessary.
Treatment options may include medications, physical therapy, injections, or surgery, depending on the underlying cause of the pain.

Kansas Pain Management also offers a range of minimally invasive procedures to help alleviate pain and restore function. With board-certified and fellowship-trained physicians, Kansas Pain Management is committed to providing the highest quality care for patients suffering from pain. You can book an appointment with us at Overland Park, Lawrence, Leavenworth/Lansing, Roeland Park, etc. We also serve nearby locations like Ottawa, Missouri, Topeka, Belton, Manhattan, Lee’s Summit, Johnson County & Kansas areas.