A sphenopalatine ganglion block reaches a nerve bundle behind the nose. It is used for certain headache and face pain problems.
What is a sphenopalatine ganglion block?
The sphenopalatine ganglion sits deep behind the inside of the nose. It plays a part in several headache and face pain conditions. We can reach it through the nose with a thin applicator.
What is a sphenopalatine ganglion block used for?
- Cluster headache
- Some migraine and facial pain
- Certain post-traumatic head and face pain
What to expect
- Done through the nostril. No needle goes through the skin.
- Takes a few minutes.
- A short bitter taste and a full feeling in the nose are common.
- No sedation and no driver needed for most patients.
What are the side effects of a sphenopalatine ganglion block?
It is done through the nostril with no needle through the skin. That makes it one of the better-tolerated blocks. Expect a bitter taste at the back of the throat, a stuffy nose for a while, and now and then a brief nosebleed. Your throat will be numb, so take care with hot drinks for a short time afterward. It is not done during an active nose infection.
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How do you know if a sphenopalatine ganglion block worked?
The response is usually fast, within minutes. That makes the diagnostic reading simple.
It is used for specific headache and face pain problems, not for headache in general. A poor response is a fair reason to rethink the diagnosis rather than repeating the block.
Before and after your procedure
No needle through the skin and no sedation, so you can drive yourself. Expect a bitter taste, temporary nasal congestion and possibly a brief nosebleed. Take care with hot drinks for an hour or so while the throat is numb. Not performed during an active nasal infection, so reschedule if you have a cold.
What is the procedure for a sphenopalatine ganglion block?
The sphenopalatine ganglion sits in a small space behind the nose. It carries autonomic fibers (nerves that run automatic body functions like tears and a runny nose). These play a part in several headache and face pain problems. The simplest approach is transnasal, through the nose. A thin applicator soaked in local anesthetic is placed along the back of the nasal cavity. It stays in place for several minutes. There are no needles in the common approach and no sedation is required.
Who it suits, and who it does not
It is used for cluster headache, some migraine, and face pain with autonomic features, such as tearing or a stuffy nose on one side. It suits patients who want a low-risk option before stepping up. It is not useful for headache without those features. It is not a long-term answer on its own. When it helps, it is usually part of a broader plan.
Why the order matters here
Treatment aimed at the wrong structure gives a poor result. Worse, it tells you nothing. That is why we confirm a target before committing to anything long-lasting. It costs one visit, and it changes the odds a great deal. Patients who come to us having had several unsuccessful injections elsewhere almost always had them without that step.
Common questions
Does it hurt?
Most say it feels odd, not painful. There is pressure and a taste at the back of the throat.
Does it involve a needle?
Usually not. The common approach places an anesthetic-soaked applicator through the nostril and leaves it there for a few minutes.
What does it feel like?
Pressure at the back of the nose, and a bitter taste as the anesthetic runs down. Most patients find it uncomfortable, not painful.
How long does it help?
It varies a great deal, from hours to weeks. If the response is good but short, the usual next step is to repeat it or pair it with other treatment.
Does a sphenopalatine ganglion block help migraine?
For some migraine, yes. This is most true when the headache comes with autonomic features on one side, such as a watering eye or a stuffy nostril. It is not useful for headache without those features. When it does help, it usually works within minutes. It is one part of a broader plan, not a long-term answer on its own.
Who should not get a sphenopalatine ganglion block?
It is not done during an active nasal infection, so if you have a cold, reschedule. It is also the wrong tool for headache without the autonomic features it targets, and for headache in general. If a block gives a poor response, that is a reason to rethink the diagnosis, not to keep repeating the block.
What should I do after a sphenopalatine ganglion block?
You can drive yourself, because there is no needle through the skin and no sedation. Expect a bitter taste at the back of the throat, a stuffy nose for a while, and possibly a brief nosebleed. Your throat will be numb, so take care with hot drinks for an hour or so. Notice how your pain changes, since a response usually comes within minutes.
Sources
- Cometa MA et al. Sphenopalatine ganglion block: do not give up on it just yet!. British journal of anaesthesia, 2021. PubMed 33795136
- Murphy CA et al. Sphenopalatine Ganglion Block for Postdural Puncture Headache. Pain medicine (Malden, Mass.), 2020. PubMed 32049339
- Yan Y et al. Transnasal sphenopalatine ganglion block for treating postdural puncture headache: A case report and literature review. Asian journal of surgery, 2024. PubMed 39048437
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