Stellate Ganglion Block

The stellate ganglion is part of the sympathetic nervous system that is located in your neck, on either side of your voice box. These nerves are part of the sympathetic nervous system, an important messaging network that controls key body functions, such as heart rate, blood flow, and sweat secretion.

A stellate ganglion block (SGB) is an injection of medication into these nerves that can help relieve pain in the head, neck, upper arm, and upper chest. It also can help increase circulation and blood supply to the arm.

A stellate ganglion block is used to diagnose or treat circulation problems or nerve injuries, including complex regional pain syndrome (CRPS), herpes zoster infection “shingles” affecting the head, neck, arm, or upper chest and phantom limb pain. A stellate ganglion injection may decrease swelling, pain, and abnormal sweating in the upper extremities.

A stellate ganglion block may be right for you if you have nerve pain in the head, neck, upper arm or upper chest that does not respond to other treatment. The risk of complications from a stellate ganglion block is very low. However, there could be bruising or soreness at the injection site. Although uncommon, risks may include infection, bleeding, allergic reaction to the medication, and nerve damage.

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