People who suspect that their sinus inflammation may be related to dust, mold, pollen, or food-or any of the hundreds of allergens that can trigger a respiratory reaction-should consult a doctor. Various tests can determine the cause of the allergy and also help the doctor recommend steps to reduce or limit allergy symptoms. Avoid all dairy products and restrict white flour, pastries, and cakes by people who are sensitive. Avoid smoky atmospheres and do not fly when nasal passages are acutely inflamed or blocked, as the changes in air pressure can give severe pain and could damage the eardrum.