Stellate ganglion block (SGB)

A stellate ganglion block (SGB) is a medical procedure used to block or numb a collection of nerves called the stellate ganglion, located in the neck.

If you’re struggling with chronic pain or anxiety, Stellate Ganglion Block (SGB) may offer long-lasting relief by calming the body’s stress response.A stellate ganglion block (SGB) is a medical procedure that blocks or numbs a collection of nerves called the stellate ganglion, located in the neck. These nerves are part of the sympathetic nervous system, which helps regulate involuntary functions such as blood flow, heart rate, and sweating. Think of it as a post station responsible for sending signals to some territories in your body. The block is performed by injecting a local anesthetic around the stellate ganglion to interrupt nerve signals.

In the body, there are other nerve relay stations, such as the sympathetic ganglia, which serve similar roles in transmitting nerve signals. Dysfunction or abnormal activity in these ganglia can lead to chronic pain and neurological issues. Specialist doctors at Cherry Medical can help patients manage pain by temporarily blocking nerve activity.

Relieve chronic pain and improve circulation with SGB at Cherry Medical—call (714) 819-0000 today.

Where is stellate ganglion?

The stellate ganglion, part of the sympathetic nervous system, is located near the sixth and seventh cervical vertebrae (C6–C7) in the neck. It functions as a relay center for sending nerve signals to the head, neck, chest, and arms. When this system becomes overactive or dysregulated, it can lead to chronic pain or other health issues.

PTSD
Stellate Ganglion Block

Purpose of the Stellate Ganglion Block

SGB is performed for various pain and vascular disorders, as well as for certain psychiatric conditions:

  • Chronic Pain Management

Chronic pain conditions such as Complex Regional Pain Syndrome (CRPS), peripheral neuropathy, persistent pain in the arm, hand, or face, and post-herpetic neuralgia (pain following shingles) can significantly impact daily life. Stellate Ganglion Block (SGB) has been shown to provide effective relief by targeting the sympathetic nervous system and reducing nerve-related pain.

  • Vascular Conditions


Stellate Ganglion Block (SGB) can effectively improve blood circulation in vascular conditions. In patients with Raynaud’s disease, it reduces painful vasospasms, while in cases of frostbite, it promotes tissue recovery by enhancing blood flow to the affected areas.

  • Psychiatric Uses

Stellate Ganglion Block (SGB) has shown promising results in the treatment of Post-Traumatic Stress Disorder (PTSD). By calming the overactive sympathetic nervous system, SGB can help reduce common PTSD symptoms such as anxiety, intrusive flashbacks, and sleep disturbances, improving overall quality of life.

  • Post-Herpetic Neuralgia

A condition caused by shingles that affects nerves in the face or neck can be alleviated by SGB. Your doctor typically uses an ultrasound, which is a more accurate and safer option compared to a live X-ray, to guide the needle to the correct spot. You can watch a Video about this procedure.

Purpose of the Stellate Ganglion Block
Purpose of the Stellate Ganglion Block

Benefits and Possible Risks of SGB

The Stellate Ganglion Block (SGB) is a minimally invasive procedure that targets the sympathetic nerves in the neck. It can provide pain relief, improve blood circulation, and reduce anxiety or PTSD symptoms, while some temporary and manageable side effects may occur. The table below presents a comprehensive overview of the benefits, possible risks, and potential complications of SGB:

BenefitsAdvantages of Stellate Ganglion Block (SGB)Possible Risks and Side Effects
Reduces chronic painHelps treat Complex Regional Pain Syndrome (CRPS) and peripheral neuropathyTemporary drooping of the eyelid or small pupil (Horner’s syndrome)
Improves blood circulationIncreases blood flow in conditions like Raynaud’s disease and frostbiteHoarseness or temporary voice changes
Controls anxiety and PTSD symptomsReduces symptoms of Post-Traumatic Stress Disorder (PTSD), including anxiety and flashbacksDizziness or temporary weakness
Enhances sleep qualityImproves sleep quality and overall relaxationBruising, minor pain, or swelling at the injection site
Minimally invasive and fastCan be performed in a clinic setting as an outpatient procedureInfection at the injection site (rare)
Balances autonomic nervous systemReduces overactive sympathetic nervous system activity and restores neural balanceAllergic reaction to local anesthetic (rare)

SGB Injection Procedure Explained

Stellate Ganglion Block (SGB) is a minimally invasive procedure typically performed by a pain management or anesthesiology specialist at Cherry Medical Clinic, often on an outpatient basis. This step-by-step approach ensures a safe, effective, and precise procedure, helping reduce chronic pain, improve blood flow, and manage symptoms of PTSD.

The procedure is carried out in the following steps:

  • Patient Positioning: The patient lies on their back with the head slightly tilted backward to allow easy access to the neck.
  • Skin Preparation: The injection area is cleaned and disinfected to prevent infection.
  • Guidance and Targeting: Using ultrasound or fluoroscopy, the doctor precisely locates the stellate ganglion. Ultrasound guidance is preferred for accuracy and safety.
  • Injection: A small amount of local anesthetic is injected near the targeted nerves to temporarily block sympathetic nerve activity.
  • Monitoring: The patient is monitored for 30–60 minutes after the injection to observe for any immediate reactions.
  • Recovery: Most patients can resume normal activities gradually, though it is recommended to avoid driving for a few hours. Some patients may require a series of SGB injections for optimal results.
SGB Injection Procedure Explained
SGB Injection Procedure Explained

Recovery After Stellate Ganglion Block

After receiving a Stellate Ganglion Block (SGB) at Cherry Medical Clinic, patients are usually monitored for 30–60 minutes to ensure safety and prevent potential complications. During this time, you may notice temporary numbness, hoarseness, or a warm sensation on one side of your face. It is recommended to avoid driving or strenuous activities for several hours and gradually return to your normal daily routine. Depending on your condition, your doctor may suggest a series of injections over several weeks to achieve the best possible results.

Who Should Avoid SGB?

Always consult your physician before deciding to undergo a Stellate Ganglion Block (SGB), as this procedure may not be suitable for individuals with the following conditions:

 

  • Have active infections at the injection site
  • Take blood thinners or have bleeding disorders
  • Suffer from uncontrolled diabetes or cardiovascular disease
  • Are allergic to local anesthetics

Cherry Medical offers pain management and neurological treatment Services to help patients relieve chronic pain and nerve-related conditions.

FAQs about Stellate Ganglion Block

The frequently asked questions below provide comprehensive and practical information about Stellate Ganglion Block (SGB). If you are considering this procedure or need specialized consultation and guidance, you can Contact Us at Cherry Medical Clinic.

What are the potential risks or side effects?

It is generally safely done by an experienced physician; some uncommon but potential risks include:

  • Temporary hoarseness
  • Drooping eyelids (Horner’s syndrome), which resolves within a few hours
  • Difficulty swallowing temporarily
  • Rare risks like bleeding, infection, or nerve damage

How long does the relief last, and how many blocks are needed?

It varies. If we see some improvements after the first injection, we usually recommend doing 2-6 blocks in a row with a few weeks in between.

Do I need to stop any medication before this procedure?

Aspirin should be held for 6 days and Eliquis (Apixiban) for 3 days. Warfarin (Coumadin) must be stopped for 5 days and until INR is less than 1.3. All of these can be started the day after the procedure. 

Is SGB helpful for people without PTSD?

Yes, SGB can also reduce anxiety symptoms in individuals without PTSD. Studies have shown significant reductions in anxiety scores.

Can Stellate Ganglion Block (SGB) help with anxiety?

Yes, SGB can reduce anxiety by calming overactive sympathetic nerves and the body’s “fight-or-flight” response.

Why is ultrasound used for Stellate Ganglion Block (SGB)?

Ultrasound guidance allows the physician to accurately locate the stellate ganglion and surrounding structures, improving the safety and effectiveness of the injection while minimizing the risk of complications.

How soon do patients feel the effects of SGB?

Most patients experience relief from anxiety within 30 minutes to 2 weeks after the procedure.

Can Stellate Ganglion Block (SGB) help with POTS (Postural Orthostatic Tachycardia Syndrome)?

Yes, SGB can help some patients with Postural Orthostatic Tachycardia Syndrome (POTS) by temporarily blocking overactive sympathetic nerves in the neck. This may reduce symptoms such as rapid heart rate, dizziness, and anxiety, improving overall autonomic balance.

Is SGB suitable for everyone?

Consultation with a physician is essential to ensure the procedure is appropriate for your specific condition.

How can I book an appointment at Cherry Medical?

You can easily book an appointment with Dr. Alireza Bozorgi at Cherry Medical by:

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