What is the Difference Between Allergies and a Sinus Infection?

Allergies and sinus infections differ primarily in their cause and duration. Allergies result from your immune system overreacting to harmless substances like pollen or dust, causing symptoms that persist as long as you're exposed to the trigger. Sinus infections occur when bacteria, viruses, or fungi inflame the sinus cavities, typically lasting 7-10 days for acute cases. Allergic symptoms include clear nasal discharge, sneezing, and itchy eyes that worsen seasonally. Sinus infections produce thick, colored mucus, facial pain, and pressure around the cheeks and forehead. While allergies rarely cause fever, sinus infections often do, with temperatures reaching 101-102°F in bacterial cases.

Related Questions

• How long do sinus infection symptoms typically last?

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• Can allergies lead to sinus infections?

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