A Sphenopalatine ganglion (SPG) block is used to treat migraines and relieve chronic headache pain.
The SPG contains sensory nerves, including the trigeminal nerve which is the main nerve involved in headache disorders, such as migraines or chronic cluster headaches. The numbing agent blocks pain receptors in the SPG from sending out pain signals, thus relieving headache pain for patients. Patients are awake for the entire procedure. Temporary pain relief can come as quickly as a few minutes after the procedure and last for hours. Patients can have the procedure at one to two-week intervals. Side effects are mild and may include sore throat, nausea, dizziness, vomiting, or worsening headache. Side effects typically last less than 24 hours. The SPG intranasal catheter may be an effective solution for patients suffering from chronic migraines and when other relief options are not working.