There are three main mechanisms by which sinus issues lead to dizziness:
While sinus-related dizziness is uncomfortable, it is rarely life-threatening. However, you should seek immediate medical attention if:
Sinus infections produce excess mucus. This mucus often drains down the back of the throat (post-nasal drip). This constant dripping can irritate the throat and the lining of the Eustachian tube, further exacerbating inflammation and blockage.
Can a Sinus Infection Cause Vertigo During Seasonal Allergies?
Here is a detailed text covering how and why sinus issues cause dizziness, the different types of dizziness involved, and how to distinguish it from other conditions.