Is there a way to treat sinusitis without antibiotics?

Yes: The goal is to decongest the sinuses and to help expel the excess mucus. Nasal irrigations, decongestants (oral and nasal sprays), steroids, (oral and nasal sprays), mucolytics, and allergy meds, such as antihistamines (only use if you have allergies) are very useful.Other than the steroids, you can find all these medications/treatments over-the-counter. See a doctor if not better in several days.

Sinus rinses: Some of my patients have found neil med sinus rinses to be quite helpful in treating their sinus or nasal allergy symptoms. Give that a try.