From Sinus Infection ((link)): Vertigo

Your Eustachian tube regulates air pressure in your middle ear. When sinus inflammation blocks this tube, pressure builds up inside the ear. This excess pressure pushes against the round and oval windows of the inner ear, distorting the fluid inside the semicircular canals.

Because vertigo is also a symptom of stroke, Multiple Sclerosis, and Meniere’s disease, it is vital to know the specific signature of sinus-induced vertigo. vertigo from sinus infection

But here is the critical detail:

You stand up a little too fast from the couch, or you tilt your head back to put in eye drops, and the world suddenly lurches. The ceiling swoops left, the floor drops out from under you, and for a terrifying two seconds, you have to grab the doorframe to keep from crashing down. Your Eustachian tube regulates air pressure in your

For a bacterial sinus infection, doctors prescribe antibiotics and steroids. For vertigo, doctors prescribe vestibular suppressants like Meclizine (Antivert) or benzodiazepines. Because vertigo is also a symptom of stroke,