Ethmoidal silent sinus syndrome after nasal swab test

This study reported the case of a healthy male in his 40s who presented with a 3-month history of frontal headache and post-nasal drip, which did not improve with oral antibiotics. One month prior to the onset of the symptoms, he underwent a nasopharyngeal swab testing for SARS-CoV-2 (which yielded a negative result) for a history of malaise and cough. The patient claimed that the swab insertion into the nasal cavity was particularly painful on...