If there is Eustachian tube dysfunction from nose or sinus inflammation, fluid can remain
in the middle
ear which can lead to dizziness. So, therapy
for this lies
in treating the underlying sinusitis. If it is a chronic sinus infection, 4-6 weeks of antibiotics are pretty standard in addition to nasal steroid sprays, oral steroids, and salt water irrigations of the sinuses. If this fails to solve the problem, sinus surgery is usually recommended.
Hope this helped and do keep us posted.