• 27 Oct, 2026
• UnityPain
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Sympathetic Nerve Block | Unity Pain Clinic Modesto CA

When Pain Takes Over Your Life

Living with severe, burning, or widespread pain can feel overwhelming. You may have tried many treatments without finding much relief. If your pain feels like it is spreading, changing, or getting worse over time, it can be discouraging. You are not alone in this struggle, and there are options worth exploring with your care team.

One option that some people with certain types of chronic pain may benefit from is called a sympathetic nerve block. This is a procedure that targets a part of your nervous system that may be contributing to your pain. Understanding what this procedure is and how it works can help you have a more informed conversation with your doctor.

What Is the Sympathetic Nervous System?

Your nervous system has two main parts that work automatically — meaning you do not have to think about them. One part is called the sympathetic nervous system. It controls things like your heart rate, blood flow, and how your body responds to stress. It is often called the “fight or flight” system.

In some people with chronic pain, the sympathetic nervous system seems to play a role in making pain worse. It can cause blood vessels to tighten, increase sensitivity in the nerves, and create a cycle of pain that is hard to break. Conditions like Complex Regional Pain Syndrome (CRPS), certain types of nerve pain, and poor circulation pain may involve the sympathetic nervous system in this way.

What Is a Sympathetic Nerve Block?

A sympathetic nerve block is an injection of medication near a group of sympathetic nerves. The goal is to interrupt or calm the nerve signals that may be adding to your pain. The medication used is typically a local anesthetic, sometimes combined with a steroid or other agents, depending on your specific situation.

There are different types of sympathetic nerve blocks depending on where your pain is located. A stellate ganglion block targets nerves in the neck area and may help with pain in the head, neck, or arm. A lumbar sympathetic block targets nerves in the lower back and may help with pain in the legs or feet. A celiac plexus block is used for abdominal pain in certain conditions. Your doctor will evaluate which type may be right for you.

What Can a Sympathetic Nerve Block Help With?

Sympathetic nerve blocks are not for everyone. They are generally considered when other treatments have not provided enough relief. Some of the conditions where a sympathetic nerve block may be considered include:

• Complex Regional Pain Syndrome (CRPS) — a condition that causes intense burning pain, often in an arm or leg
• Peripheral vascular disease — a condition involving poor blood flow to the limbs
• Herpes zoster (shingles) pain — nerve pain caused by the shingles virus
• Phantom limb pain — pain felt in a limb that has been amputated
• Hyperhidrosis — excessive sweating linked to sympathetic nerve activity
• Certain types of cancer-related pain

It is important to understand that a sympathetic nerve block is a diagnostic and therapeutic tool. Sometimes it is done first to see if the sympathetic nervous system is involved in your pain. If you feel relief after the block, it helps confirm that the sympathetic nerves are playing a role. This information can then guide future treatment decisions.

What Happens During the Procedure?

A sympathetic nerve block is typically done in a clinical or procedure room setting. You will lie in a position that allows the doctor to safely access the injection site. The skin is cleaned and numbed first. Then, using imaging guidance such as fluoroscopy (a type of real-time X-ray) or ultrasound, the doctor carefully places a needle near the target nerve cluster.

The procedure itself usually takes only a few minutes, though you may spend some time in the office before and after for preparation and monitoring. Most people go home the same day. You may feel some soreness at the injection site, and your care team will give you instructions on what to watch for afterward. Results can vary from person to person, and some people may need more than one injection to see the best results.

Is a Sympathetic Nerve Block Safe?

Like any medical procedure, a sympathetic nerve block does carry some risks. These may include temporary soreness, bruising, or numbness at the injection site. More serious but rare risks can include infection, bleeding, or unintended effects on nearby structures. Your doctor will review your health history carefully before recommending this procedure to make sure it is appropriate and safe for you.

The use of imaging guidance during the procedure helps improve accuracy and reduce risk. It is important to discuss all of your questions and concerns with your provider before moving forward. A thorough evaluation is always the right first step before any pain procedure.

Taking the Next Step Toward Relief

If you have been living with burning, spreading, or hard-to-treat nerve pain, it may be time to explore what options are available to you. A sympathetic nerve block is one piece of a larger pain management plan that might also include physical therapy, medication management, and other supportive care.

At Unity Pain Management in Modesto, CA, our team is here to listen and help you find a path forward. We work with most insurance plans and offer in-person and telehealth visits to make care more accessible. You deserve to be heard, evaluated carefully, and treated with compassion. Reach out to our team to schedule a consultation and learn whether a sympathetic nerve block or another treatment option may be right for your situation.

References

• Stanton-Hicks, Michael. “Complex Regional Pain Syndrome.” Anesthesiology Clinics of North America. 2003.
• National Institute of Neurological Disorders and Stroke. “Complex Regional Pain Syndrome Fact Sheet.” National Institutes of Health. 2023.
• Cepeda, M. Soledad, et al. “Sympathetic Block with Local Anesthetic for Treating Complex Regional Pain Syndrome.” Cochrane Database of Systematic Reviews. 2005.
• Mayo Clinic Staff. “Stellate Ganglion Block.” Mayo Clinic. 2023.
• International Association for the Study of Pain. “CRPS: Current Diagnosis and Therapy.” IASP Press. 2005.