Yes, a sinus infection (sinusitis) can cause vertigo, but it’s important to distinguish between true vertigo (the sensation that you or the room is spinning) and general dizziness (lightheadedness, unsteadiness). Here’s a breakdown of the deep features behind this connection. The primary link between sinusitis and vertigo is anatomical proximity . Your sinuses (especially the sphenoid and ethmoid sinuses) sit very close to the temporal bone, which houses the inner ear’s vestibular system (the body’s balance center).