Stellate Ganglion Block for Long COVID: What to Expect

Living with long COVID can feel like a never-ending battle. The persistent fatigue, brain fog, and headaches can disrupt every part of your life, and it’s easy to feel hopeless when standard treatments fall short. But there’s growing excitement around a promising option: the stellate ganglion block for long COVID. This isn’t some new, experimental procedure. It’s a well-established treatment that’s now being studied for long COVID symptom management, offering a new path toward relief for millions of people still searching for answers.

Schedule a consultation at Kentuckiana Pain Specialists to discuss whether stellate ganglion block may help with your long COVID symptoms.

At Kentuckiana Pain Specialists, Dr. Ajith Nair has been performing stellate ganglion blocks for decades as part of the practice’s pain management programs. The clinic offers a dedicated Post-COVID Symptom Relief program using SGB. This article reviews the current clinical research on SGB for long COVID, explains why researchers believe it works, and helps you understand what the evidence says so far.

What Is a Stellate Ganglion Block (SGB)?

A stellate ganglion block is an injection of local anesthetic near the stellate ganglion, a cluster of sympathetic nerves located on either side of the neck at the level of the sixth and seventh cervical vertebrae. These nerves are part of the body’s sympathetic nervous system, which controls involuntary functions like heart rate, blood vessel constriction, sweating, and the “fight or flight” stress response.

When a local anesthetic is injected around the stellate ganglion, it temporarily blocks sympathetic nerve signals in the head, neck, arms, and upper chest. The procedure takes about 15 minutes and is performed using ultrasound or fluoroscopic guidance for precision. SGB has been used safely in pain management since the 1920s, originally to treat conditions like complex regional pain syndrome (CRPS), phantom limb pain, and vascular disorders. Its application to long COVID is newer, but the procedure itself is well established. You can learn more about how SGB works and signs of a successful block in our related guide.

How Could a Stellate Ganglion Block Help Long COVID?

The connection between SGB and long COVID centers on a concept called sympathetic nervous system dysregulation, also known as autonomic dysfunction. Many researchers now believe that SARS-CoV-2 infection can leave the sympathetic nervous system in a state of chronic overactivation. This “stuck in overdrive” state may explain many of the persistent symptoms that define long COVID.

When the sympathetic nervous system stays activated beyond the initial infection, it can cause a cascade of problems:

• Elevated heart rate and blood pressure fluctuations (often diagnosed as POTS, or postural orthostatic tachycardia syndrome)
• Chronic fatigue as the body expends energy maintaining a heightened stress response
• Brain fog and difficulty concentrating due to altered blood flow and neuroinflammation
• Sleep disruption from an inability to shift into a relaxed parasympathetic state
• Gastrointestinal changes including nausea and appetite disturbances

The theory behind SGB for long COVID is that temporarily blocking the stellate ganglion can “reset” the overactive sympathetic response. By interrupting the dysfunctional nerve signaling, SGB may allow the nervous system to return to a more balanced state. A 2026 systematic review published in Current Pain and Headache Reports noted that clinicians should consider SGB as an option “particularly for individuals with prominent autonomic dysfunction, such as tachycardia, dizziness, dyspnea, gastrointestinal changes, and brain fog.”

Other Potential Mechanisms: Immune Regulation and Blood Flow

Beyond just hitting the “reset” button on the nervous system, researchers think SGB might also help by calming down the body’s immune response. An overactive sympathetic nervous system, which many believe is a root cause of long COVID, can fuel chronic inflammation throughout the body. This persistent inflammation is linked to many long-haul symptoms, from fatigue to body aches. By temporarily blocking the stellate ganglion, the procedure may interrupt this cycle, helping to reduce the inflammation that contributes to feeling unwell. It’s another way this established procedure could offer relief for a very modern problem.

Another key benefit could be improved blood flow. When your “fight or flight” system is constantly on, it can cause blood vessels to tighten, restricting circulation. This is especially problematic for the brain, which needs a steady supply of oxygen-rich blood to function properly. By blocking the sympathetic nerves, SGB allows these blood vessels to relax and widen. Researchers from the Cleveland Clinic suggest this increased blood flow to the brain might help clear up brain fog and could even improve the function of nerves responsible for taste and smell. Better circulation means your body’s tissues get more of what they need to heal and work correctly.

What Does the Research Say About SGB for Long COVID?

Research on SGB for long COVID is still in its early stages, but several studies have reported encouraging results. Here is a summary of the key findings published through 2025.

Key Success Rates and Statistics

Overall Patient Outcomes

The initial data on SGB for long COVID is compelling. One key retrospective cohort study provided a hopeful look at patient outcomes. In this study, a remarkable 86% of patients reported feeling better after receiving the SGB treatment. Even more impressively, more than half of the participants—61% to be exact—stated that all of their long COVID symptoms had completely resolved. While every patient’s journey is unique, these numbers suggest that for a significant majority of individuals, SGB can provide substantial relief and, for many, a complete return to their pre-COVID health. This high rate of positive response is what has positioned SGB as a leading candidate for managing persistent post-viral symptoms.

Specific Symptom Relief Rates

Beyond general improvement, studies have also tracked how SGB affects the specific, debilitating symptoms of long COVID. The same study found that SGB was particularly effective for two of the most common complaints: fatigue and brain fog. It helped 77% of patients struggling with fatigue and 80% of those with brain fog. Other research has echoed these findings, with patients frequently reporting significant improvements in not just brain fog and severe fatigue, but also anxiety and the frustrating loss of taste or smell. For anyone whose daily life has been disrupted by these persistent issues, these statistics offer a concrete reason to be optimistic about the potential of SGB to target and alleviate the symptoms that impact them most.

The Connection to ME/CFS and Treatment Limitations

The symptoms of long COVID show a significant overlap with another complex condition: Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS). Both conditions often involve profound fatigue, post-exertional malaise, and autonomic nervous system dysfunction. Because of this similarity, researchers are exploring whether treatments effective for one might help the other. One study specifically noted that SGB appears to greatly reduce symptoms related to the autonomic nervous system in people with both long COVID and ME/CFS. This suggests the block’s mechanism—calming an overactive sympathetic nervous system—addresses a core issue in both conditions. It’s important to remember that SGB is a tool for symptom management, not a cure. At Kentuckiana Pain Specialists, our Post-COVID Symptom Relief program uses SGB as part of a comprehensive approach to improve your quality of life.

Insights from Patient Data and Study Designs

When looking at this promising research, it’s helpful to understand how the studies were designed. Much of the initial research has involved small, focused groups, which is standard for investigating new applications of existing treatments. For example, one study looked at just 10 adults who had diagnoses of both long COVID and ME/CFS. In that trial, participants received SGB injections weekly for three weeks. This kind of small-scale, intensive study allows researchers to closely monitor effects and gather detailed data. While larger studies are needed to confirm these early findings, the initial results provide a strong foundation. This also highlights the importance of a personalized approach, as treatment frequency and plans are tailored to each individual by an experienced physician like those at our clinic.

A Systematic Review of Seven Studies

The most recent overview is a systematic review published in April 2026 in Current Pain and Headache Reports. Researchers at Temple University searched two major medical databases and identified seven studies that met their inclusion criteria. The review found consistent short-term improvements across multiple symptom areas, including fatigue, cognitive dysfunction, sleep disruption, and pain. The authors concluded that “stellate ganglion block is a promising treatment that appears to generate substantive benefit for many of the symptoms seen in long COVID.”

The review also noted important limitations: the studies had small sample sizes, lacked control groups, and used different follow-up periods. The researchers emphasized the need for larger, randomized controlled trials to establish long-term effectiveness.

Findings from a 52-Patient Cohort Study

A retrospective cohort study from Boston examined 52 patients with long COVID (also called post-acute sequelae of SARS-CoV-2, or PASC) who received SGB between September 2022 and September 2024. On average, patients underwent three SGB injections. The study found that most patients reported improvement in their long COVID symptoms after treatment. The symptoms that showed the most improvement were brain fog, fatigue, dizziness, and headache. About one quarter of patients reported at least one side effect, though these were mostly short-lived.

A Pilot Study on Effectiveness and Safety

A pilot study published in the Psychopharmacology Bulletin in 2024 by Levey and colleagues examined the effectiveness and safety of SGB in patients with long COVID. The study found that SGB treatment was associated with meaningful symptom reduction and was well-tolerated. While the sample size was small, the results were consistent with findings from other groups and helped build the case for larger trials.

Insights from an Autonomic Neuroscience Chart Review

A retrospective chart review published in Autonomic Neuroscience in August 2024 documented reductions in long COVID symptoms after SGB. The study specifically tracked changes in fatigue, cognitive function, and autonomic symptoms. Results showed measurable improvement in most patients, adding to the growing body of evidence supporting SGB as a treatment option for this population.

Considering SGB for your long COVID symptoms? Contact Kentuckiana Pain Specialists to learn about the Post-COVID Symptom Relief program.

Which Long COVID Symptoms Might SGB Improve?

Based on the studies published so far, the following symptoms have shown the most consistent improvement after stellate ganglion block:

Symptom Category	Specific Symptoms	Evidence Level
Cognitive	Brain fog, difficulty concentrating, memory problems	Reported in multiple studies; among the most commonly improved symptoms
Fatigue	Chronic fatigue, exercise intolerance, post-exertional malaise	Consistently reported across studies; frequently cited as top-improving symptom
Autonomic	Dizziness, heart rate changes, POTS-like symptoms	Strong theoretical basis; improvement reported in chart reviews and cohort studies
Neurological	Headaches, sleep disruption	Reported in systematic review and individual studies
Pain	Generalized body pain, nerve-related pain	SGB has a long track record for pain conditions; improvement reported for long COVID pain
Gastrointestinal	Nausea, appetite changes	Noted in studies tracking autonomic dysfunction improvements

Not every patient experiences improvement in every symptom, and the duration of relief varies. Some patients report lasting improvement after a single injection, while others benefit from a series of two to three blocks spaced one to two weeks apart. Researchers are still working to identify which patient subgroups are most likely to benefit. Patients with prominent autonomic dysfunction symptoms appear to be the strongest candidates based on current evidence.

A Special Note on Loss of Taste and Smell

For many people with long COVID, the loss of taste and smell is one of the most disheartening symptoms, affecting everything from daily meals to cherished memories. The good news is that stellate ganglion block is emerging as a highly promising treatment for this specific issue. Recent research has shown that SGB can effectively help restore these senses, with some studies finding that about half of the patients treated for sensory loss experienced at least a 50% improvement. The theory is that the block helps “reset” the part of your nervous system that has gone into overdrive, allowing the nerve signals for taste and smell to function properly again. If you’re struggling with this frustrating symptom, it’s a key area where our Post-COVID Symptom Relief program may be able to help.

What Happens During the SGB Procedure?

If you decide to try SGB for long COVID, the procedure is straightforward and performed on an outpatient basis. At Kentuckiana Pain Specialists, the process follows these steps:

1. Evaluation: Dr. Nair reviews your medical history, COVID history, and current symptoms. Not all long COVID patients are candidates for SGB, so a thorough assessment is part of the process.
2. Preparation: You will be positioned comfortably, and the skin over your neck is cleaned. The procedure area is numbed with a small amount of local anesthetic.
3. Guided injection: Using ultrasound or fluoroscopy for precision, the doctor places a thin needle near the stellate ganglion and injects local anesthetic. The injection itself takes about one minute.
4. Observation period: You rest in the clinic for 15 to 30 minutes. It is normal to notice some temporary changes on the treated side of your face, including a droopy eyelid, a smaller pupil, and reduced sweating. These are expected signs that the block reached the right nerves, and they typically resolve within four to eight hours.
5. Follow-up: Most patients can return to normal activities the same day. Your doctor will schedule a follow-up to evaluate your response and determine whether additional injections would be beneficial.

You can read more about the typical timeline and expected duration of relief in our article on how long a stellate ganglion block lasts.

The SGB Injection Process at Kentuckiana Pain Specialists

The SGB procedure itself is surprisingly quick and straightforward. At our clinic, the entire appointment takes about 15 minutes. We use advanced imaging, like ultrasound or fluoroscopy, to guide a very thin needle to the correct spot near your neck. This precision is key to ensuring the local anesthetic is delivered exactly where it needs to be—around the stellate ganglion. The injection itself only takes about a minute. While its use for long COVID is newer, SGB is a well-established procedure that has been used safely in pain management since the 1920s to treat other conditions involving the sympathetic nervous system. This long history provides a strong foundation of safety and reliability for our Post-COVID Symptom Relief program.

How Quickly Can You Expect Results?

One of the most common questions we get is about the timeline for relief. The answer can vary from person to person and depends on the specific symptoms being treated. Based on recent studies, many people report feeling better very quickly—sometimes within just 15 minutes of the injection. For other symptoms, like brain fog and fatigue, the improvement may be more gradual, developing over the next few days or weeks as your nervous system begins to regulate itself. The research highlights that the symptoms showing the most significant improvement are often brain fog, fatigue, dizziness, and headache. It’s an encouraging sign that a single, minimally invasive procedure can offer such a noticeable change for these persistent issues.

What Are the Risks and Side Effects of SGB?

SGB has a long safety record spanning over a century of clinical use. The most common side effects are temporary and expected. They include the Horner’s syndrome signs mentioned above (droopy eyelid, smaller pupil, reduced sweating on one side of the face), hoarseness from temporary effects on the recurrent laryngeal nerve, and a warm sensation in the arm on the treated side.

Serious complications are rare. The 2025 Boston cohort study found that about 25% of patients reported at least one side effect, but most were mild and resolved quickly. The 2026 systematic review concluded that SGB “has been used safely in pain management” and that the available studies did not report any serious adverse events related to the procedure.

Patients with bleeding disorders, active infections at the injection site, or certain cardiovascular conditions may not be appropriate candidates. A full medical evaluation before the procedure helps ensure safety.

Who Might Not Be a Good Candidate for SGB?

While SGB is a promising and well-established procedure, it isn’t the right fit for every person experiencing long COVID symptoms. Certain pre-existing health conditions can increase the risks associated with any injection-based treatment, making it essential to determine if you are a suitable candidate. For instance, individuals with active infections, unmanaged bleeding disorders, or specific severe cardiovascular conditions may be advised against the procedure. This is why a comprehensive medical evaluation is a critical first step before moving forward. A specialist will carefully review your health history to ensure the potential benefits outweigh any risks. The goal is always to find the safest and most effective path to relief for your specific situation.

What We Still Don’t Know About SGB for Long COVID

Honesty about the current state of the evidence is important. While the results so far are promising, several limitations exist:

• Small sample sizes: The largest published study included 52 patients. Most studies have fewer than 30 participants.
• No randomized controlled trials: None of the published studies compared SGB to a placebo injection or sham procedure. This means it is difficult to separate the effects of SGB from placebo effects or natural symptom improvement over time.
• Varied study designs: Different studies used different symptom measures, follow-up periods, and injection protocols, making direct comparisons challenging.
• Unknown long-term outcomes: Most studies tracked patients for weeks to a few months. Whether SGB provides lasting relief or requires ongoing treatment is not yet clear.
• Patient selection criteria are still being defined: Researchers have not yet identified which specific long COVID patients are most likely to benefit from SGB.

These limitations do not mean SGB is ineffective for long COVID. They mean that the evidence is still building. As the 2026 systematic review noted, “definitive evidence will require identification of optimal treatment protocols and clarification of which patient subpopulations would derive the greatest benefit from this procedure.”

Understanding the Cost and Insurance Coverage for SGB

When you’re dealing with persistent symptoms, the last thing you want to worry about is finances. But cost and insurance are important factors in any healthcare decision. Understanding the potential expenses for a stellate ganglion block can help you plan and make an informed choice. The final cost depends on the specifics of the procedure and your insurance plan, and the administrative team at Kentuckiana Pain Specialists is always available to help you with your specific questions.

Potential Costs of the Procedure

The cost for a stellate ganglion block can vary, often ranging from a few hundred to a couple of thousand dollars. This price depends on key details, like whether the procedure is on one side of the neck or both (bilateral). Another factor is the use of imaging guidance. To ensure the highest safety and precision, Dr. Nair performs SGB using ultrasound to see the needle’s path in real-time. This is the standard of care for minimizing risks. The best way to get an accurate estimate is to discuss it with our team.

Navigating Insurance and Payment Options

Figuring out insurance coverage can be tricky, especially for a newer treatment application like SGB for long COVID. Many insurance companies consider it “investigational” and might not cover it automatically. However, coverage often depends on the diagnosis. SGB is an approved treatment for conditions like complex regional pain syndrome (CRPS) and other forms of neck pain. Since these issues are common in long COVID, the procedure may be covered when billed for those established conditions. We recommend calling your insurance provider to ask about coverage. Our patient care coordinators can also help.

Using an HSA or FSA

If your insurance doesn’t cover the full cost, or if you have a high-deductible plan, remember your Health Savings Account (HSA) or Flexible Spending Account (FSA). These tax-advantaged accounts are designed for out-of-pocket medical expenses. A stellate ganglion block is a qualified medical expense, meaning you can use your pre-tax HSA or FSA funds to pay for it. This can be a significant financial help, making the treatment more accessible with benefits you’ve already set aside for your health.

Frequently Asked Questions

Is Stellate Ganglion Block FDA-Approved for Long COVID?

SGB is not specifically FDA-approved for long COVID. It is an established medical procedure that has been used for decades to treat pain conditions and sympathetic nerve disorders. Its use for long COVID is considered “off-label,” which means the procedure itself is approved and well-studied, but its application to long COVID is based on emerging clinical evidence rather than a specific FDA indication.

How Many SGB Injections Are Needed for Long COVID?

The number of injections varies by patient. Some individuals report significant improvement after a single block, while others benefit from a series of two to three injections spaced one to two weeks apart. The Boston cohort study found that patients received an average of three injections. Your doctor will evaluate your response to the first block to determine if additional treatments are warranted.

Will Insurance Cover SGB for Long COVID?

Insurance coverage varies by plan and by the specific reason for the procedure. Coverage for SGB is more commonly approved for established pain conditions like CRPS. For newer applications like long COVID, coverage decisions are made on a case-by-case basis. The team at Kentuckiana Pain Specialists can help you check your coverage and understand your options.

How Soon After a COVID Infection Can I Get an SGB?

SGB for long COVID is typically considered after symptoms have persisted for at least three months following a COVID infection, which aligns with the clinical definition of long COVID (also called PASC). Your doctor will evaluate whether your symptoms suggest autonomic dysfunction that might respond to SGB.

Can SGB Help with Long COVID Anxiety and Mood Changes?

SGB has been studied for anxiety and PTSD independently of long COVID, and there is evidence that it can help calm the sympathetic stress response. Some long COVID patients in published studies reported improvements in anxiety and mood alongside physical symptoms. Because long COVID-related anxiety often stems from the same autonomic dysfunction that SGB targets, there is a reasonable basis for expecting benefit, though more research is needed.

Long COVID symptoms can disrupt every part of your daily life. Contact Kentuckiana Pain Specialists to learn if stellate ganglion block could be part of your recovery plan.

Key Takeaways

• SGB may calm an overactive nervous system: The procedure is a simple injection that temporarily blocks a nerve cluster in your neck. The goal is to “reset” the body’s fight-or-flight response, which researchers believe contributes to persistent long COVID symptoms like fatigue and brain fog.
• Early studies report significant symptom relief: While research is ongoing, initial findings are very encouraging. Patients in studies have reported major improvements in some of the most disruptive long COVID symptoms, including brain fog, chronic fatigue, and the loss of taste and smell.
• It’s a well-established procedure with a strong safety profile: SGB is not a new or experimental treatment; it has been used safely in pain management for decades. The first step is always a thorough evaluation with a specialist to see if this quick, minimally invasive procedure is the right option for you.

Related Articles

• Post-COVID Symptom Relief SGB – Kentuckiana Pain Specialists
• Understanding Stellate Ganglion Anatomy
• How Long Does a Stellate Ganglion Block Last?