Stellate ganglion block | Integrity Pain

Overview

Understanding stellate ganglion block

The stellate ganglion is part of the sympathetic nervous system, which helps regulate blood flow, sweating, temperature, and the body’s stress response. A stellate ganglion block temporarily interrupts signals in this region with an image-guided injection.

In pain medicine, the procedure may be considered for selected sympathetically maintained pain patterns involving the head, neck, or upper extremity, including some cases of complex regional pain syndrome. The diagnosis, expected benefit, alternatives, and individual risks must be reviewed before treatment.

Important evidence boundary

Stellate ganglion block and PTSD

Stellate ganglion block has been studied for PTSD symptoms, but it is not a cure and should not replace diagnosis or ongoing care from a qualified mental health clinician. A 2020 multisite randomized trial in active-duty service members found greater short-term symptom improvement after two right-sided blocks than after sham procedures, while an earlier randomized trial did not support widespread or indiscriminate use.

The 2023 VA/DoD clinical practice guideline concluded that evidence remains insufficient to recommend for or against stellate ganglion block for PTSD. Trauma-focused psychotherapies such as prolonged exposure, cognitive processing therapy, and EMDR remain the most strongly recommended PTSD treatments. If SGB is discussed, it should be considered an adjunct within a coordinated treatment plan, with realistic expectations and continued mental health follow-up.

Useful context

When this may be discussed

Selected complex regional pain syndrome or sympathetically maintained pain involving the head, neck, or upper extremity
Testing whether sympathetic signaling contributes to a carefully evaluated pain pattern
Selected PTSD symptoms only after a separate mental health evaluation and a clear discussion of the limited and mixed evidence

At the clinic

What the process may involve

01
Review of the reason for treatment, medications, bleeding risk, heart and lung history, glaucoma, infection risk, and alternatives
02
Monitoring, positioning, skin preparation, and ultrasound or fluoroscopic guidance near the lower neck
03
Injection of local anesthetic after the clinician confirms a safe needle position
04
Observation for temporary effects such as eyelid drooping, a smaller pupil, warmth, hoarseness, swallowing change, or arm numbness

Benefits, limits, and risks

Questions to discuss before treatment

Temporary Horner syndrome, including eyelid drooping and a smaller pupil on the treated side, is an expected sign of sympathetic blockade and usually resolves as the anesthetic wears off.
Potential complications include bleeding or hematoma, infection, vascular or nerve injury, seizure from intravascular injection, pneumothorax, breathing or swallowing difficulty, and unintended spread of local anesthetic. Image guidance reduces risk but does not eliminate it.
For PTSD, benefit is not guaranteed, durability is uncertain, and current evidence is not strong enough to make SGB a first-line or stand-alone treatment.
Call 911 for a medical emergency. Anyone in suicidal crisis or emotional distress can call or text 988 for immediate support.

References

Sources and further reading

These references provide general education. They do not replace advice from a clinician who knows your health history.