What Is SGB? A Patient Guide to Stellate Ganglion Block for PTSD, Anxiety, and Nervous System Reset

If you have been searching for answers around PTSD treatment, anxiety relief, or ways to calm your nervous system, you may have come across something called a Stellate Ganglion Block (SGB). While the name can sound technical, the idea behind it is actually very intuitive.

Many people struggling with anxiety or trauma eventually realize that their symptoms are not just “in their head.” They are felt in the body. There is tension that never goes away, sleep that never feels restorative, and a constant sense of being on edge. Even when life appears calm on the outside, the body can remain stuck in a state of alert. SGB is a treatment designed to address that physical component directly.

To understand why this matters, it helps to look at how the body responds to stress. The nervous system is built to protect you. When a threat is detected, your sympathetic nervous system activates, preparing you to fight or flee. This response increases heart rate, sharpens focus, and heightens awareness. In short bursts, it is incredibly helpful. However, when stress is ongoing or when trauma has occurred, this system does not always return to baseline. Instead, it can remain activated, almost like a switch that cannot fully turn off. Over time, this can lead to symptoms such as chronic anxiety, hypervigilance, irritability, poor sleep, and difficulty relaxing. For some individuals, this pattern is part of Post-Traumatic Stress, but many people experience similar symptoms even without a formal diagnosis.

A Stellate Ganglion Block (SGB) works by targeting a key control center within this stress response system. The stellate ganglion is a bundle of nerves located in the lower part of the neck, and it plays an important role in regulating sympathetic activity. During the procedure, a small amount of local anesthetic is placed near this nerve bundle using precise ultrasound guidance. The goal is not to numb an area in the traditional sense, but to temporarily quiet the overactive signals that are keeping the body in a heightened state. By interrupting that cycle, the nervous system is given an opportunity to reset and return to a more balanced baseline.

At Reset Medical and Wellness, this concept has been further developed into a more advanced approach called Neuro Sympathetic Reset, or NSR. While NSR is built on the same foundation as SGB, it is not simply a standard version of the procedure. It is a more comprehensive, trauma-informed model that focuses not only on the technical aspects of the injection, but also on how the entire experience supports healing. This includes how patients are prepared, how the procedure is performed, and what happens afterward.

From a technical perspective, NSR utilizes a dual-level approach that targets both the cervical sympathetic chain and the stellate ganglion. This allows for a more complete modulation of the stress response, rather than focusing on a single point. From a patient standpoint, the procedure itself is relatively simple. It is performed in an outpatient setting, and the injection typically takes only a few minutes, with a short period of monitoring afterward. A temporary drooping of the eyelid on the treated side, sometimes accompanied by warmth in the face or arm, is expected and actually confirms that the medication has reached the intended area. These effects resolve on their own and are not harmful.

Just as important as the procedure itself is how the care is delivered. In a trauma-informed approach, the entire experience is intentionally designed to feel safe, predictable, and supportive. Patients are guided step by step so there are no surprises, helping reduce anxiety even before treatment begins. This carries through during the procedure, where the focus is not only on technical precision, but also on how the patient feels in the moment. The nervous system responds to the environment as much as the intervention, so creating a calm and grounded setting helps the body become more receptive to the reset.

After the procedure, the focus shifts to integration. Rather than viewing the block as a one-time solution, it becomes part of a broader healing process. As the nervous system settles, many patients find they can engage more effectively in therapy, mindfulness, and other supportive practices. This often creates a window where emotional processing feels more manageable and less overwhelming.

Many patients describe a noticeable shift, often a sense of calm that feels unfamiliar after years of being on edge. Their mind feels quieter, their body more relaxed, and their reactions less intense. Sleep may improve, and daily stressors feel easier to handle. Life does not necessarily change overnight, but the way the body responds to it does, and that can make all the difference.

It is important to recognize that results can vary. That said, dual-level sympathetic blocks, including the NSR approach, have shown encouraging outcomes, with about 80% of patients experiencing meaningful improvement in symptoms of Post-Traumatic Stress Disorder and moderate to severe anxiety. The duration of benefit can range from months to even years in some cases, and treatment plans are individualized based on each patient’s response and goals. NSR protocols are often structured to optimize and extend these outcomes, supporting more sustained and lasting change over time.

What makes this approach especially meaningful is the shift in how we think about conditions like anxiety and trauma. Traditional treatments often focus on thoughts, behaviors, or medications. While these can be effective, they do not always address the underlying physiological state of the nervous system. SGB and NSR recognize that the body itself can become dysregulated. By helping the nervous system settle first, it becomes much easier for the mind to follow.

For many patients, this perspective is both validating and empowering. It helps explain why they may have struggled despite their best efforts, and it offers a new path forward. Instead of feeling stuck in a cycle of stress and reactivity, they are given a tool that works directly with the body’s stress response. This often creates a sense of relief, as well as a renewed sense of possibility.

At its core, a Stellate Ganglion Block, and the more advanced Neuro Sympathetic Reset, are about restoring balance. They help shift the body out of a constant state of alert and into a place where healing can occur. For individuals who feel like their nervous system has been stuck in overdrive, this can be a meaningful turning poin

t. And for many, it becomes the first step toward feeling like themselves again.

• Michael Louwers, MD