Treatment of Pediatric Patients That Lost Sense of Smell Due to COVID-19

Inclusion Criteria: * Subjects ages 6 to 21 who have loss of smell (anosmia) or dysosmia (disordered smell perception) and thought to have occurred due to COVID-19. * Subjects who are able to complete the smell test (UPSIT), self-report their loss of smell, and do the assigned daily therapy. Exclusion Criteria: * Duration of anosmia or dysosmia \<60 days * Previous smell retraining * Prior interventions for loss of smell (excluding those on Flonase and Azelastine) * Contraindications for nasal budesonide treatment, as determined by the treating physician * Active cigarette smoker or use of vapes * Previous head trauma * Congenital anosmia * History of brain tumor * Neurocognitive disorders * Multiple sclerosis * Seizure disorder * Cystic fibrosis * Primary Ciliary Dyskinesia * History of nasal polyps * Inability to self-report