One of my very early diagnoses was vasomotor rhinitis, which is basically rhinitis without allergy or infection being the cause. I do have allergies as well- I’ve been tested several times. But it was middle of winter, when I do not have allergies. My allergens are weeds, grasses, trees. Funny, I have repeatedly NOT tested as allergic to molds.
Anyway, after lots of research into vasomotor rhinitis, I happened to read in the HYH book that Buchholz calls vasomotor rhinitis just another manifestation of migraine.