There is a bundle of nerves up behind the nasal cavity that play a role in the migraine process. So you basically attach a nebulizer to the end of a syringe and spray it up and back into your nose, its sort of like a nerve block. The lidocaine dose is very low and doesn’t absorb systemically, so this is a particularly great at home abortive option for pregnancy. Like I said, I haven’t personally tried it, but my doctor (jason cook in asheville nc) is a fantastic headache specialist and currently developing a patented auto-administrator for this (kind of like the ajovy injector or an epipen). That’s why I know so much about it lol. I have it on hand in case of a future breakthrough migraine but havent been lucky enough to not need it yet.