This is the most common cause. The Eustachian tube connects the middle ear to the back of the throat and regulates air pressure. When sinuses are congested, the mucous membranes at the opening of the Eustachian tube swell shut.
It can be difficult to tell if your dizziness is from your sinuses or something else. Here is how to tell the difference: does sinus cause dizziness
Let’s break down the anatomy, the mechanisms, and when you should worry. This is the most common cause