Sphenopalatine Ganglion (SPG) Block

A Sphenopalatine Ganglion (SPG) block is a minimally invasive procedure used to treat chronic headaches, facial pain, and certain nerve disorders. The sphenopalatine ganglion is a group of nerve cells located deep behind the nose that helps control pain sensation in the head, face, and neck.

By delivering a local anesthetic to the SPG, this block can interrupt pain signals, leading to fast and effective relief for certain types of head and facial pain.

Your provider may recommend an SPG block if you suffer from:

• Chronic migraines
• Cluster headaches
• Trigeminal neuralgia
• Atypical facial pain
• Post-herpetic neuralgia (pain after shingles)
• Head and neck pain related to autonomic dysfunction

The procedure can be both diagnostic (helping confirm the pain source) and therapeutic (providing pain relief).

There are several techniques for delivering an SPG block, but the most common approach is through the nose (transnasal method):

• You will lie comfortably on your back with your head tilted slightly back.
• A soft applicator (similar to a Q-tip) soaked in local anesthetic is inserted gently into each nostril.
• The applicator remains in place for 5–15 minutes to allow the medication to reach the SPG.
• Alternatively, your provider may use a small catheter to apply the anesthetic with more precision.
• The procedure is quick, simple, and well-tolerated, often done in an office setting.

• You may experience immediate relief from headache or facial pain.
• Some patients feel numbness or slight pressure in the throat, face, or behind the eyes temporarily.
• Mild nasal irritation, bitter taste, or slight nosebleed can occur but usually resolves quickly.
• You should avoid strenuous activities for the rest of the day.
• Many patients experience significant pain reduction lasting from days to months, depending on the underlying condition.

SPG blocks are generally very safe. Possible, but rare side effects include:

• Mild nasal irritation or congestion
• Temporary numbness in the throat or face
• Bitter or unusual taste
• Minor nosebleed
• Allergic reaction to medications (extremely rare)

At Horizon Spine & Pain of Utah, we take every precaution to ensure your safety and comfort.

Patients trust Horizon Spine & Pain of Utah because we provide:

• Board-certified pain management and headache specialists
• Expertise in precision-guided SPG blocks
• Personalized, patient-centered treatment plans
• Minimally invasive therapies for faster, lasting relief

Our team is committed to helping you live with less pain and more comfort every day.