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