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Stellate Ganglion Block

What is Stellate Ganglion Block?

Stellate ganglion blocks are the injection of local anesthetic around the nerves of the sympathetic nervous system found on either side of the voice box, in the neck. Stellate ganglion blocks may help to reduce pain, swelling, discoloration and/or sweating changes and may improve mobility in the upper extremities. Stellate ganglion blocks may be useful in the treatment of reflex sympathetic dystrophy (RSD), complex regional pain syndrome (CRPS) and herpes zoster (shingles) that involve the eye, face, head or upper extremities.

The Procedure

Stellate ganglion blocks are performed in the office. Patients are required to check in 30 minutes prior to their scheduled appointment time.

Once taken back to the preparation area, a small IV catheter will be placed in your hand or arm. This catheter may be used to administer light sedation for the procedure.

When taken to the procedure room, you will be placed on your back with a pillow under your chest to allow your head to drop back. Blood pressure and oxygen saturation monitors will be applied. The injection sites will be cleansed with an antiseptic solution and draped in a sterile manner. Using a small, thin needle, local anesthetic is injected to numb the skin and deep tissue, which may feel like a stinging and/or burning sensation.

Assisted by fluoroscopy (X-ray), the physician is able to correctly place the needle and inject local anesthetic, which numb the nerves. Following the procedure, you may feel a warm sensation in your upper extremities and an absence or a decrease in pain. You may also feel a “lump” in your throat and a hoarse voice, as well as drooping of your eye and nasal congestion on the side of the injection for 4-6 hours following the injection.

The procedure will take approximately 5-10 minutes to complete. If you respond well to the first injection, a series of additional injections may be indicated.


The local anesthetic used for the stellate ganglion block will wear off in a few hours. However, the sympathetic block may last longer and will generally increase after each injection. You may experience “soreness” of the injection site for 1-3 days following your procedure. We advise patients to “take it easy” for the remainder of the day. You may perform activities as tolerated.

Once the procedure is over, you will be taken to a recovery area, where you will be monitored for 15-30 minutes and released to go home. You MUST have someone available to drive you home. Failure to have a driver may result in your procedure being rescheduled. You should be able to return to work the next day.

Stellate Ganglion Block Risk Factors

Stellate ganglion blocks are commonly performed procedures. Because of the low risk and low incidence of any significant problems or side effects, this is felt to be a reasonable procedure to follow when other conservative therapies have failed to produce improvement.

Possible side effects may include:

  • Infection
  • Bleeding
  • Hematoma
  • Pain at the injections site
  • Headache
  • Temporary increase in pain

You may feel lightheaded and/or unsteady; this is usually due to the sedation you were given during the procedure.

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