Possible: Mri is not a sensitive tool for sinusitis. Often, the sinuses are normal when one lights up on an mri. Your symptoms are not classic for a sinus infection, and MRI is better for looking for central nervous system problems as the cause of your headache. I would ask your doctor for an antibiotic good for sinusitis and follow up with a ct scan of the sinuses for the definitive answer.
Answered 7/10/2018
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