A sphenopalatine ganglion (SPG) block is a quick, minimally invasive procedure that delivers numbing medication to a nerve cluster behind the nose to help calm migraines, cluster headaches, and certain facial-pain conditions when other treatments have not been enough.
OVERVIEW
What a sphenopalatine ganglion block is and how it works
The sphenopalatine ganglion is a small bundle of nerves located deep behind the bridge of the nose, in a space called the pterygopalatine fossa. It plays a role in many headache and facial-pain conditions because it carries sensory fibers along with parasympathetic (autonomic) fibers that affect the face, sinuses, and lining of the nose. By delivering a local anesthetic to this ganglion, the block aims to interrupt and quiet the pain signals traveling through it.
Because the ganglion sits close to the back of the nasal passage, the medication can often be applied through the nose rather than with a deep needle. A thin, soft catheter is guided into the nostril and a small amount of anesthetic is delivered near the ganglion; in some cases the block is performed with a fine needle under image guidance. Your physician chooses the approach based on your anatomy and the condition being treated.
An SPG block can be both diagnostic and therapeutic. Your response helps confirm whether this nerve cluster is contributing to your headaches or facial pain, and the same block may also provide meaningful relief. It is one of several plexus and ganglion blocks we offer for complex, hard-to-treat pain. At Columbia Pain & Spine Institute in Gresham and Portland, Oregon, our fellowship-trained physicians use it as part of a broader plan rather than as a stand-alone cure.
Commonly treats
YOUR PROCEDURE
What to expect during a sphenopalatine ganglion block
Before
Your physician reviews your headache history, prior treatments, and any imaging to confirm an SPG block is appropriate. Be sure to share your full medication list, including any blood thinners, so your team can advise you ahead of time. Sedation is not usually needed for the transnasal approach, so most patients can drive themselves to and from the visit.
During
You rest comfortably lying back with your head slightly extended. For the transnasal approach, a soft catheter is gently passed into the nostril and anesthetic is delivered near the ganglion; you may notice a brief taste or a numb sensation in the back of the throat. When a needle technique is used, image guidance such as fluoroscopy helps position the needle precisely. The injection itself takes only a few minutes.
After and recovery
- The whole visit is usually brief, often around 15 to 30 minutes including preparation and a short period of monitoring.
- You may notice relief soon after the block; mild numbness in the nose or throat or a slight bitter taste can occur and typically fades quickly.
- Because sedation is generally not required for the transnasal approach, most people return to normal activities the same day.
- Temporary, minor effects such as a numb sensation, light-headedness, or nasal irritation are usually short-lived.
RELATED PROCEDURES
Related headache and facial-pain treatments
Occipital nerve block
Targets nerves at the back of the head for occipital neuralgia and cervicogenic and tension-type headaches. Learn more.
Trigeminal nerve block
Addresses facial pain along the trigeminal nerve, including trigeminal neuralgia and chronic facial pain. Learn more.
Stellate ganglion block
A sympathetic block for CRPS of the head, neck, and upper extremity and related symptoms. Learn more.
For chronic migraine prevention, we also offer Botox & Dysport injections. Browse the full plexus and ganglion blocks category or all of our services to see how these options fit together.
FAQS
Frequently asked questions
Is a sphenopalatine ganglion block painful?
Most patients tolerate it well. The transnasal approach uses a soft catheter rather than a deep needle, so discomfort is usually limited to a brief odd taste or a numb feeling in the nose and throat. When a needle technique is used, the area is numbed and image guidance helps keep the procedure precise.
How long does relief last?
This varies. Some people feel improvement within minutes that lasts hours to weeks, while others gain more durable benefit with a planned series of blocks. Because the block is also diagnostic, your response helps your physician decide on the most effective next step.
Is this a cure for my headaches?
No. An SPG block is one tool for managing migraine, cluster headache, and facial pain, not a guaranteed or permanent cure. It works best as part of a comprehensive plan, and we make no promises about specific outcomes.