How does sinus infections affect the inner ear leading to imbalance and dizzyness?

Interrelated. Your sinuses and ears are connected inside your head. So sinus congestion, infection and stuffiness can affect the pressure in your ears. This in turn can cause an imbalance and dizziness. If you are suffering, get to an ENT dr.
It is not usually. A cause and effect but rather two separate manifestations of the same virus.

Related Questions

Floor feels like it moves when I stand up and laying down I'm ok but certain ways I move my head I can get dizzy headed. Dr said frontal sinus infection and said it wasn't bppv nor inner ear. Tumor?

Doubt sinus problem. Frontal sinus if properly diagnosed by a cat scan almost never produces the feeling you are describing. How was the diagnosis of frontal sinusitis made? It does not sound like you have had a ct of the sinuses. Otherwise, you would not question tumor. If bppv (benign paroxysmal positional vertigo) has been ruled out, a neurologist may be helpful. Read more...
Difficult to say. You'll need a complete evaluation by an ENT specialist and/or neurologist. Read more...

Went to my dr today with symptoms of dizziness and she said frontal sinus infection and I passed the nuerological test. Does this mean inner ear ok?

Most likely . Since you were examined by a physician, and did not complain of your vertigo, rather than nonspecific dizziness, i would suppose that the inner ear function is normal. Recommend passing the specific question to your doctor. Read more...

I've been on zithromax since 1/21 for inner ear and sinus infection, but still have the dizziness, when will it go away or could it be a brain tumor?

Ear infection. Inner ear infections can affect balance. This is a complex system and usually will recover slower than the actual infection, sometimes as long as 3-4 weeks. If symptoms persist longer than this timeframe, reevaluation is indicated by your treating physician. Brain tumors of the inner ear can cause dizziness as a presenting symptom, but most of these tumors present with hearing loss. Read more...