How Do Stellate Ganglion Blocks (SGB) Work?

SGBs work by blocking the sympathetic nervous system, which is responsible for the 'fight or flight' response. This allows the parasympathetic nervous system to restore balance, breaking physical, psychological, and chemical patterns contributing to various conditions.

How long does the procedure take?

The actual SGB procedure typically takes only a few minutes, though the entire appointment may last longer for preparation and monitoring.

How does SGB help with PTSD and anxiety symptoms?

SGB helps with PTSD and anxiety by blocking the sympathetic nervous system, which is often overactive in these conditions. This can reduce symptoms like hypervigilance, anxiety, and emotional reactivity.

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Stellate Ganglion Block (SGB)

Q: What is a Stellate Ganglion?

The stellate ganglion is a collection of sympathetic nerves located in the neck, on either side of the voice box. It is part of the sympathetic nervous system, which controls the 'fight or flight' response.

Q: What is a Stellate Ganglion Block (SGB)?

A Stellate Ganglion Block (SGB) is an injection of local anesthetic around the stellate ganglion, which temporarily blocks the sympathetic nerves and can help reduce symptoms of PTSD, chronic pain, and dysautonomia.

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During chronic stress or trauma, the nervous system can remain stuck in a constant “fight-or-flight” state, even after the original threat has passed. This ongoing sympathetic overactivation can disrupt sleep, mood, pain regulation, and overall health. Stellate ganglion block (SGB) therapy is designed to interrupt this cycle by helping reset nervous system signaling, allowing the body to regain balance between the sympathetic and parasympathetic systems. For carefully selected patients, an SGB procedure may reduce symptoms tied to prolonged stress responses and improve quality of life.

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Stellate Ganglion Block Procedure FAQ

What is a Stellate Ganglion?

The stellate ganglion is a small bundle of nerves located on each side of the lower neck. It plays a key role in regulating the sympathetic nervous system, which controls the body’s “fight-or-flight” response. When this system becomes overactive, it can contribute to ongoing symptoms related to stress, pain, and autonomic imbalance.

What is a Stellate Ganglion Block (SGB)?

A stellate ganglion block is a targeted, image-guided injection that delivers a local anesthetic near the stellate ganglion. The goal is to temporarily calm excessive sympathetic nerve activity, giving the nervous system an opportunity to reset and restore balance.

How does SGB work?

By briefly interrupting nerve signals associated with the fight-or-flight response, SGB allows the autonomic nervous system to recalibrate. Many patients describe this as a “reset,” similar to restarting a system that has been stuck in overdrive. As the medication wears off, the nervous system often resumes function at a healthier baseline.

What conditions may benefit from SGB?

Research suggests SGB may help certain patients with conditions linked to sympathetic overactivity, including:

- PTSD and trauma-related symptoms

- Anxiety disorders

- Dysautonomia and autonomic imbalance

- Certain chronic pain conditions, such as CRPS, migraines, or post-herpetic neuralgia

A thorough evaluation is required to determine whether SGB is appropriate.

What is the procedure like?

SGB is performed on an outpatient basis using real-time ultrasound guidance for accuracy and safety. The injection itself usually takes less than 10 minutes, followed by a short observation period. A temporary drooping eyelid or voice hoarseness can occur and typically resolves within hours. Patients should arrange for a driver after the procedure.

How soon will results appear and how long do they last?

Some patients notice changes within hours or days, while others experience gradual improvement over several weeks. The duration of benefit varies. A series of injections spaced a few weeks apart may be recommended based on response and symptoms.

Who is a good candidate for SGB?

SGB may be considered for patients whose symptoms are driven by chronic sympathetic nervous system activation and have not responded adequately to standard treatments. It is not a treatment for primary personality disorders, seizure disorders, or certain neurological conditions. Medical screening is essential to confirm eligibility.

Is SGB covered by insurance?

In most cases, insurance will not cover the cost of an SGB. Our office will provide you with a superbill for insurance reimbursement purposes but please note that you will most likely not receive reimbursement for these services.