For many patients, the most disabling part of long COVID is not the lingering cough or fatigue. It is the new, unfamiliar anxiety, the racing heart, the sense of being unable to settle the nervous system, and the constant feeling that the body is in a state of low-grade emergency. These symptoms can persist months or even years after the initial infection, and they often do not respond fully to traditional anxiety medications or therapy alone.
The stellate ganglion block, commonly referred to as SGB, is a procedure originally developed for pain management that is now being explored for its effects on the sympathetic nervous system. At Evolve Medical, we offer SGB for carefully selected patients with post-COVID anxiety, autonomic dysfunction, and related symptoms. Below is what you should know.
Understanding the Stellate Ganglion
The stellate ganglion is a cluster of nerves located in the lower neck, just above the collarbone. It is part of the sympathetic nervous system, which controls the body’s fight-or-flight response. When the sympathetic system is overactivated, the body remains in a state of heightened arousal: elevated heart rate, shallow breathing, hypervigilance, sleep disruption, and a persistent sense of unease.
SGB involves the injection of a local anesthetic near the stellate ganglion. The goal is to temporarily quiet sympathetic signaling, giving the nervous system a chance to reset. Although the anesthetic itself wears off in hours, the downstream effects on autonomic regulation can last weeks to months for many patients.
Why SGB for Long COVID?
Researchers studying long COVID have observed that many patients show signs of autonomic dysfunction, with the sympathetic nervous system stuck in overdrive. This pattern overlaps significantly with conditions like PTSD, where SGB has shown promise. The hypothesis is that SARS-CoV-2 infection, in some patients, leaves behind a dysregulated autonomic state that drives ongoing anxiety, panic, sleep problems, exercise intolerance, and brain fog.
Early case series and small clinical studies have reported meaningful symptom improvement following SGB in selected long COVID patients. While larger trials are still needed, the existing data and the underlying physiology have made SGB a reasonable option to discuss for patients who have not responded to other treatments.
Symptoms That May Improve With SGB
Patients considering SGB for post-COVID anxiety often describe a constellation of symptoms that include:
- New or worsened anxiety since infection, including panic attacks.
- Racing or pounding heart, particularly upon standing or with mild exertion.
- Difficulty falling asleep or staying asleep.
- Hypervigilance, irritability, or feeling on edge throughout the day.
- Brain fog and difficulty concentrating.
- Heat or temperature intolerance.
- Sense of being unable to take a full breath, despite normal oxygen levels.
- Fatigue that worsens dramatically after minor exertion.
Not every patient will benefit. SGB is most likely to help patients whose symptoms are driven by sympathetic overactivation rather than other root causes. This is why a thorough evaluation with Dr. Sarij is critical before recommending the procedure.
What to Expect During the Procedure
SGB is performed as an outpatient procedure. You will lie on your back with your neck slightly extended. The injection site is cleansed and a small amount of local anesthetic numbs the skin. Using ultrasound guidance, a thin needle is positioned near the stellate ganglion, and a local anesthetic is delivered. The procedure itself typically takes 15 to 20 minutes.
Most patients experience temporary side effects on the treated side: a slight drooping of the eyelid, a smaller pupil, nasal congestion, a warm sensation in the arm, or a hoarse voice. These effects are expected, confirm that the block has worked, and resolve within several hours.
After a short observation period, patients are typically able to go home the same day. We ask that someone drive you home and that you avoid eating or drinking for a couple of hours after the procedure as a precaution.
Timeline of Results
Some patients notice changes within hours of the procedure: a sense of calm, deeper breathing, easier sleep that first night. For others, the benefits build over the following days and weeks as the autonomic nervous system continues to recalibrate.
Duration of benefit varies. Some patients experience lasting improvement from a single block. Others benefit from a second block, performed on the opposite side or as a repeat treatment, depending on the response.
Safety and Candidacy
When performed by a trained physician under ultrasound guidance, SGB has a strong safety profile. Serious complications are rare. Common minor effects are temporary and resolve on their own.
SGB is not appropriate for everyone. Certain anatomical considerations, bleeding disorders, infections at the injection site, and specific medical conditions can make it unsafe. Patients on certain blood thinners may need adjustments before the procedure.
A consultation at Evolve Medical includes a detailed review of your long COVID history, current symptoms, prior treatments, and any other relevant medical factors. Our goal is to make sure SGB is the right next step, and to coordinate it within a broader recovery plan that may include IV nutrient therapy, peptide therapy, and lifestyle modifications.
Key Takeaways
- The stellate ganglion is a key relay point in the sympathetic nervous system, which is often dysregulated in long COVID.
- SGB involves a targeted injection of local anesthetic, performed under ultrasound guidance, to temporarily quiet sympathetic signaling.
- Symptoms that may improve include anxiety, racing heart, sleep disruption, hypervigilance, and brain fog.
- The procedure takes about 15 to 20 minutes and most patients return home the same day.
- SGB is best considered within a comprehensive long COVID treatment plan, after a thorough medical evaluation.
Frequently Asked Questions
Some patients notice changes within hours of the procedure, including a sense of calm, deeper breathing, and easier sleep that first night. For others, benefits build over the following days and weeks as the autonomic nervous system continues to recalibrate. Individual responses vary based on symptom profile and underlying physiology.
Insurance coverage for SGB depends on the indication and your specific plan. SGB for pain management has more established coverage pathways than its use for autonomic dysfunction or post-COVID symptoms, which is still emerging. Our team can discuss what may be covered and what is typically out of pocket during your consultation.
Duration of benefit varies. Some patients experience lasting improvement from a single block. Others benefit from a second block, performed on the opposite side or as a repeat treatment, depending on the response. Although the local anesthetic itself wears off within hours, the downstream effects on autonomic regulation can last weeks to months for many patients.
In most cases, yes. SGB is not a replacement for psychiatric medications, and many patients continue their existing prescriptions while pursuing SGB. Any changes to your medication regimen should be made in coordination with the prescribing physician, not based on SGB alone.
Most patients experience expected temporary effects on the treated side: a slight drooping of the eyelid, a smaller pupil, nasal congestion, a warm sensation in the arm, or a hoarse voice. These confirm that the block has worked and resolve within several hours. Serious complications are rare when SGB is performed by a trained physician under ultrasound guidance.
SGB is a procedural intervention that targets the autonomic nervous system directly, rather than treating symptoms one at a time through medications, supplements, or behavioral therapies. It works best as part of a broader long COVID recovery plan that may also include nutrient therapy, peptide therapy, sleep optimization, and graded autonomic conditioning.
Schedule a Consultation at Evolve Medical
Evolve Medical is a physician-led regenerative and functional medicine practice with two Long Island locations in Deer Park and Dix Hills. To learn whether this therapy is appropriate for your situation, schedule a consultation with Dr. Hasib M. Sarij and the Evolve Medical team. Every treatment plan is built around a thorough evaluation of your health history, current symptoms, and personal goals.
(631) 253-1313
Medical disclaimer: This article is for educational purposes only and is not intended as medical advice, diagnosis, or treatment. Always consult a qualified physician about your specific health concerns.
