Platelet Rich Plasma

What Is a Ganglion Impar Block?

The ganglion is an area where nerves, which send all kinds of signals to the brain (including pain signals), come together. The ganglion impar rests in front of the bony triangle located at the base of your spine, also known as the sacrum. A ganglion impar block disrupts chronic pain in several areas:

  • Anal area
  • Lower area of the rectum
  • Lower part of the urethra
  • Scrotum
  • Tailbone
  • Vagina and Vulva

What does the procedure look like?

Done in the clinic at Portland Pain and Spine, this procedure is generally administered under light sedation, takes less than 15 minutes, and you will be awake during the procedure. Once you are comfortable in a face-down position on the exam table and fully relaxed, your doctor will sterilize the injection site. At this point, you will receive an injection of local anesthesia. It may briefly sting, but you will quickly become numb.

Using fluoroscopic guidance (x-ray), your doctor will insert a needle into the area around your tailbone. Your doctor will stop the advancement of the needle once it has reached the correct spot – the Ganglion Impar. A small amount of contrast dye will first be injected, as this shows up on Xray and is an additional step in ensuring the injection is in the right spot.

Depending on your condition, your doctor will inject either an anesthetic and a steroid, or just one or the other. You might feel a slight burning sensation, or a warm pressure, at the injection site. The procedure is now over.

You will then rest for 30 – 60 minutes while your team continues to monitor your vital signs, and then you will be released to go home shortly thereafter.

Request An Appointment

We want to assure our patients that Portland Pain and Spine remains open and actively managing your pain. Medication management is given the highest priority. Our relocation across the hall in the Washington building is complete but requires office renovation before we can accommodate patient visits. Staffing shortages affected our ability to communicate last month, however, this was temporary. Dr. Balog has reached out to all patients but asks that if anyone has additional questions or concerns to contact him at
We have updated our phone messaging system to assist with calls. There are now options to speak with a live receptionist, leave messages or speak with our new billing company. Medical record requests can be processed on our website at and are handled by Morgan Records Management. Thank you for your patience during this transition. We look forward to providing you high-quality care as we enter into 2024! 

Wishing you all a joyful holiday season.