A stellate ganglion block is an image-guided injection of local anesthetic near a cluster of sympathetic nerves in the lower front of the neck, used to calm overactive nerve signaling that can drive burning pain in the face, neck, arm, or hand. It may help people with complex regional pain syndrome, certain nerve pain and circulation problems of the arm, and some other conditions involving the sympathetic nervous system. Board-certified pain specialists at California Pain Consultants in San Diego evaluate candidates and perform stellate ganglion blocks as part of an individualized plan.
For some patients, chronic pain is not just about aching muscles or injured joints.
The body stays tense. The nervous system feels constantly “on.” Sleep becomes difficult. Anxiety increases. Pain may spread into the arms, neck, chest, or face. Some patients experience burning sensations, temperature changes, sweating abnormalities, or severe nerve sensitivity that seems impossible to control.
The purpose of Stellate Ganglion Block is not to promise a cure. It is to address a carefully identified pain source, support function, and help the patient participate more comfortably in an individualized care plan.
What Is Stellate Ganglion Block?
Understanding the diagnosis and treatment target helps set realistic expectations before Stellate Ganglion Block is recommended.
The body’s nervous system controls far more than movement and sensation. Part of the nervous system, called the sympathetic nervous system, helps regulate the body’s automatic stress responses. The sympathetic nervous system is responsible for the well-known “fight or flight” response.
The stellate ganglion is a group of sympathetic nerves located in the lower neck region. Cleveland Clinic describes its location as the front side of the neck next to the C7 and T1 vertebrae. When this nerve cluster becomes involved in chronic pain or nervous system dysfunction, symptoms may develop that affect both physical and emotional well-being.
A stellate ganglion block is one type of sympathetic block. Similar blocks at other levels of the spine are used for the legs, abdomen, and pelvis.
When Stellate Ganglion Block May Be Considered
A procedure or medication plan is chosen only after the likely pain source, prior care, health history, and personal goals have been reviewed.
Complex Regional Pain Syndrome (CRPS)
CRPS is one of the most common reasons for Stellate Ganglion Block treatment. CRPS may involve severe burning pain, swelling, temperature changes, and hypersensitivity. Cleveland Clinic reports that CRPS affects about 200,000 people every year in the United States, affects females more often than males, and typically begins within four to six weeks after an injury, fracture, or surgery. Learn more on our complex regional pain syndrome page.
Chronic Nerve Pain of the Upper Extremities
Some patients with arm or hand nerve pain may benefit from sympathetic nerve treatment.
Post Traumatic Stress Disorder (PTSD)
Research involving Stellate Ganglion Blocks for PTSD continues to grow, and some patients report improvement in hyperarousal symptoms and nervous system overactivation. Cleveland Clinic notes that this research has been ongoing since 1990, but that the FDA has not approved the procedure for PTSD.
Facial Pain Syndromes
Certain facial pain conditions involving sympathetic nerve pathways may respond to SGB therapy.
Circulatory Disorders
Some circulation-related conditions affecting the upper extremities may benefit from sympathetic blockade.
Phantom Limb Pain
Selected patients with chronic neuropathic pain, including phantom limb pain, may also benefit from sympathetic nerve-targeted treatment.
Symptoms and Daily-Life Effects to Discuss
Tell your clinician where symptoms occur, what makes them better or worse, and how they affect function. That pattern can be as important as an imaging result.
- Burning pain
- Skin sensitivity
- Temperature changes
- Tingling
- Swelling
- Color changes in the skin
- Excessive sweating
- Deep aching discomfort
How Candidacy Is Evaluated
Not everyone with a related diagnosis is a candidate for Stellate Ganglion Block. Evaluation is used to confirm the treatment target and compare reasonable alternatives.
Medical History
Your clinician reviews pain location, stress-related symptoms, trauma history, sleep disturbances, and previous treatments.
Physical Examination
The exam looks for skin temperature changes, swelling, sensory abnormalities, nerve sensitivity, and movement limitations.
Imaging and Care Planning
Imaging may sometimes help guide diagnosis or rule out structural causes contributing to symptoms. The diagnosis is often based on symptom patterns and nervous system involvement.
What to Expect During Stellate Ganglion Block
Specific instructions vary. The care team explains preparation, anesthesia or medication decisions, what the patient may feel, and the follow-up plan before treatment. Cleveland Clinic notes the procedure usually takes less than 30 minutes.
Step 1: Preparation
The patient is positioned comfortably, and the skin over the neck is cleaned carefully.
Step 2: Imaging Guidance
Using ultrasound or fluoroscopic imaging guidance, the physician carefully identifies the target area near the stellate ganglion. Imaging guidance improves accuracy and safety.
Step 3: Medication Injection
Anesthetic medication is injected near the stellate ganglion. The goal is interrupting abnormal sympathetic nerve signaling.
Step 4: Recovery and Observation
Patients are monitored briefly after the procedure before returning home; Cleveland Clinic describes recovery-room monitoring of about 40 to 60 minutes.
Recovery, Timing, and Follow-Up
Response to Stellate Ganglion Block varies with the diagnosis, treatment technique, and individual health factors. Follow the specific instructions provided by your care team.
After Treatment
Recovery is generally relatively quick, and most patients return home shortly after treatment. Temporary throat numbness or hoarseness may occasionally occur but usually improves within several hours. A droopy eyelid, a smaller pupil, or warmth in the arm on the treated side can also appear for a few hours; these are expected signs that the sympathetic nerves have been reached.
When Improvement May Begin
Some patients notice symptom improvement relatively quickly, while others experience gradual changes over time. Timing depends on the condition being treated, nervous system sensitivity, and how long symptoms have been present. Cleveland Clinic notes that pain can return a few hours later as the anesthetic wears off.
How Long Effects May Last
Relief duration varies significantly between patients. Possible patterns include:
- Temporary improvement
- Progressive improvement after repeat treatments
- Long-term symptom reduction as part of a broader care plan
Multiple treatments may sometimes be recommended depending on the condition. Cleveland Clinic states that some people are pain-free for days or weeks, and that people usually need a series of injections; sometimes two are enough, and sometimes more than 10 are needed.
Potential Benefits of Stellate Ganglion Block
The goal is meaningful improvement in comfort and function, not an unsupported promise that every symptom will disappear.
- Reduced nerve pain
- Improved circulation
- Reduced sympathetic overactivity
- Better sleep
- Reduced stress-related nervous system symptoms
- Improved daily function
- Many patients report feeling calmer, more comfortable, and more functional after successful treatment
- A treatment plan matched to a defined pain source
Risks, Safety, and When to Call
All treatments have risks. The risks of Stellate Ganglion Block depend on the technique, medication or device, anatomy, and individual health history. Cleveland Clinic notes that the common side effects usually go away within a few hours.
- Temporary hoarseness
- Difficulty swallowing briefly
- Bleeding
- Infection
- Temporary eyelid drooping
- Nerve irritation
Contact your care team for fever, increasing swelling, drainage, severe pain, persistent hoarseness, or weakness that does not improve as expected. Seek urgent medical care for trouble breathing or swallowing, fainting, or new or progressive weakness.
How This Treatment Fits into Comprehensive Care
Interventional care is most useful when it supports a broader plan built around diagnosis, movement, function, emotional well-being, and informed decision-making.
Part of a Broader Plan
The goal is improving long-term function and quality of life. A plan may combine physical therapy, neuromodulation, behavioral therapy, medication management, and rehabilitation programs. In CRPS, the period of relief after a block is often used to move the affected limb more fully in therapy.
Support for Daily Life
Many patients slowly begin organizing life around avoiding triggers that worsen symptoms. Over time, chronic nervous system overactivation may affect emotional health, confidence, and overall quality of life, including the ability to sleep peacefully, manage stress, exercise, and concentrate.
Ongoing Reassessment
Pain care is adjusted over time according to function, response, side effects, and the patient’s priorities.
Is Stellate Ganglion Block Right for You?
Chronic nerve pain and sympathetic nervous system dysfunction can slowly affect nearly every part of life. They interfere with sleep, movement, emotional health, stress regulation, relationships, and daily comfort. Over time, patients may feel as though their body never fully relaxes or feels safe again.
California Pain Consultants provides individualized evaluation and discusses the expected benefits, limitations, alternatives, and risks before recommending care.
Treatment at California Pain Consultants
Your care team sees patients at four San Diego County clinics: Kearny Mesa, Rancho Bernardo, La Mesa, and Chula Vista. Stellate ganglion blocks are performed under image guidance at the Comprehensive Pain ASC in Rancho Bernardo and the EPC Surgery Center in La Mesa. At your visit, we review your symptoms and prior care, examine the affected area, and explain whether a block fits into your plan.
We accept most insurances. Call (858) 571-3630 or request your appointment to book your appointment.
Book Your AppointmentTrusted Information and Related Care
General medical references: MedlinePlus: Pain · National Institute of Neurological Disorders and Stroke: Pain.
Related California Pain resources: Complex regional pain syndrome · Sympathetic block · Conditions and treatments.
This article is for general education and does not replace an individualized medical evaluation. Recommendations depend on the diagnosis, health history, current medications, examination, imaging or diagnostic testing, and personal goals.
Frequently Asked Questions About Stellate Ganglion Block
Find clear, medically responsible answers about Stellate Ganglion Block, who may be a candidate, what to expect, and when to contact your healthcare team.
What is a stellate ganglion block, and how does it work?
A stellate ganglion block places local anesthetic near a sympathetic nerve center in the lower neck. Temporarily reducing sympathetic activity may help diagnose or treat selected pain conditions affecting the face, neck, chest, or upper limb.
What conditions or symptoms may a stellate ganglion block help address?
It may be considered for complex regional pain syndrome, sympathetically maintained upper-extremity pain, certain vascular symptoms, or other carefully selected conditions. Evidence and appropriateness vary by diagnosis.
Is a stellate ganglion block used for PTSD?
Stellate ganglion blocks have been studied for PTSD, and some patients report fewer hyperarousal symptoms. Cleveland Clinic notes that research has been ongoing since 1990 but that the FDA has not approved the procedure for PTSD. If you are interested in this use, discuss the evidence, risks, and how it would fit with your mental health care.
Can a stellate ganglion block help CRPS?
It may. Stellate ganglion blocks are among the most common treatments considered for CRPS affecting the arm or hand, and Cleveland Clinic notes that sympathetic blocks can provide significant pain relief for some people. Response varies, and blocks work best alongside physical therapy, medication, and, for some patients, neuromodulation.
Who may be a candidate for a stellate ganglion block?
A candidate has a compatible pain pattern and specialist evaluation showing that a sympathetic contribution is plausible. Blood-thinner use, infection, lung disease, swallowing problems, anatomy, and medication risks require careful review.
How should I prepare for a stellate ganglion block?
Follow instructions about fasting, blood thinners, transportation, and regular medicines. Tell the clinician about breathing or swallowing disorders, hoarseness, allergies, infection, pregnancy, and prior neck surgery.
What happens during a stellate ganglion block?
Using ultrasound or fluoroscopic guidance, the clinician advances a needle beside the sympathetic chain in the lower neck and injects local anesthetic. Monitoring is used because important nerves, blood vessels, the esophagus, and lung are nearby.
Does a stellate ganglion block hurt?
The skin is numbed first, and ultrasound or fluoroscopy is used to guide the needle, so most of the procedure involves pressure and brief discomfort. The procedure usually takes less than 30 minutes. Afterward you may notice hoarseness, a lump-in-the-throat feeling, or a droopy eyelid on that side, which usually fade within a few hours.
What is recovery like after a stellate ganglion block?
A temporary drooping eyelid, small pupil, red eye, warmth, stuffy nose, hoarseness, or swallowing change on the treated side can occur and often indicates sympathetic blockade. Do not eat or drink until swallowing is normal if instructed.
Why does my eyelid droop after a stellate ganglion block?
A droopy eyelid, a smaller pupil, and facial warmth on the treated side are expected signs that the sympathetic nerves have been blocked. They are temporary and usually go away within a few hours as the anesthetic wears off. Contact your care team if these changes last much longer or are accompanied by trouble breathing or swallowing.
What should I avoid after a stellate ganglion block?
Arrange a ride home and avoid driving for the rest of the day. Follow your care team’s instructions about eating and drinking while your throat still feels numb. Avoid strenuous activity until your care team clears you. Seek urgent care for trouble breathing or swallowing, fainting, or new weakness.
What are the possible risks or side effects of a stellate ganglion block?
Possible risks include bleeding, infection, seizure or local-anesthetic toxicity, voice or swallowing changes, nerve injury, blood-vessel injection, pneumothorax, and temporary arm weakness. Rare serious complications are possible.
How long does a stellate ganglion block last?
It varies. The numbing effect itself lasts hours, but some people have pain relief for days or weeks afterward, according to Cleveland Clinic. Many people need a series of injections, sometimes two and sometimes more than 10, to build and maintain relief. Your care team tracks your response to decide whether repeat blocks make sense.
How does a stellate ganglion block fit into a broader treatment plan?
The block may reduce pain enough to support desensitization, movement, and occupational or physical therapy. It is usually part of a broader plan for nerve pain, sleep, mood, and function.
When should I call my healthcare team or seek urgent care after a stellate ganglion block?
Seek immediate help for trouble breathing, severe swallowing difficulty, seizure, confusion, chest pain, fainting, or rapidly enlarging neck swelling. Call the team for persistent hoarseness, weakness, fever, drainage, or worsening pain.