Ganglion Impar Injection
Home » Treatments » Injection Therapy » Ganglion Impar Injection
What is a Ganglion Impar Injection?
A ganglion impar block is a type of injection that eases pain. It’s used for a variety of health problems that cause pain in the lower pelvis and groin.
Your brain sends information to the body through pathways known as nerves. Nerves also receive information from the body and send it to the proper regions of the brain. A ganglion is a place in the body where many nerves intersect. Nerves that communicate some types of pain from the lower pelvis and groin pass through the ganglion impar on their way to the brain.
The ganglion impar sits just in front of your sacrum. The sacrum is the lowest part of the spine. It is just above the tailbone (coccyx). Nerves from some parts of the lower pelvis and groin pass through this ganglion, including nerves from:
- Lower part of the rectum
- Anal region
- Lower part of the urethra
- Vagina and vulva
- Scrotum
- Tailbone
- This is the area from the anus to the vagina or base of the testicles.

Risks of a ganglion impar block?
Side Effects of Steroid Shot
Symptoms
- Severe pain
- Weakness or numbness in the legs
- Changes in bowel or bladder function
- Fever
- Signs of infection at the injection site. These include redness, swelling, and oozing.
After a Ganglion Impar Block?
Generally, you will be watched for 30 to 60 minutes after the procedure. Make sure someone can drive you home. You should not plan to do anything strenuous or anything that calls for your full attention for the rest of the day.
Ask your healthcare provider about any activity restrictions after the procedure. You should be able to eat and drink normally. Ask if you should resume your normal medicines. Make sure to follow all your healthcare provider’s instructions for care.
It is common to have some pain at the injection site for a few days. Many people feel relief from their pain soon after the procedure. This relief might last a few hours, a few weeks, or longer depending on the medicine used.