From Sinus Infection ~upd~ — Vertigo

This condition, known as viral labyrinthitis, hits like a freight train. It doesn't just cause mild dizziness when you move your head; it causes sustained, violent spinning, nausea, vomiting, and a profound feeling of unsteadiness that can last for days. This is the most common cause of "sinus vertigo" that doctors see in practice. Benign Paroxysmal Positional Vertigo (BPPV) occurs when tiny calcium carbonate crystals (otoconia) break loose from their membrane and float into the wrong semicircular canal.

But here is the critical detail:

Disclaimer: This post is for informational purposes only and does not constitute medical advice. If you are experiencing severe vertigo, sudden hearing loss, or neurological symptoms, please seek immediate medical attention. vertigo from sinus infection