Symptoms of a viral or bacterial sinus infection ... Smell loss related to colds, allergies, sinus issues, and COVID-19. American Academy of Otolaryngology-Head and Neck Surgery.

Millions of Americans experience the symptoms of chronic sinus infections and inflammation ... Two Randomized Controlled Trials (ReOpen1 and ReOpen2), The Journal of Allergy and Clinical Immunology: ...

Acute sinusitis is often preceded by a common cold or a period of increased sinus congestion. The symptoms include thick yellow or greenish discharge from the nose, nasal blockage and pain or ...