Yes: Allergy cause inflammation which blocks the sinus cavities and may promote infection.
Answered 6/8/2013
6.3k views
Yes: Sinuses have tiny openings into the nasal cavity allowing air exchange. When the nasal cavities are "congested" either from allergies (any cause), or a prolonged cold, these openings are blocked. The oxygen in the sinuses then slowly disappear and thus allows excessive growth of bacteria and consequently may cause sinus infections.
Answered 2/22/2013
6k views
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