This is Dr. David
yes, a chronic sinus infection or chronic sinusitis inflammation of the sinuses can cause low grade fevers repeatedly several times
how high are her fevers?
autoimmune conditions can cause repeated fevers as well.
if she has sinus symptoms, runny nose, sinus congestion, she should see an ENT doctor
and get a sinoscopy scope procedure
and a sinus CT scan
and she should get blood testing for ANA, ESR, C reactive protein as a screening test to look for autoimmune disorders causing repeated fevers
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