How long does a sinus infection last?

How long does a sinus infection last? This is a question everyone who has ever experienced a bad sinus infection wants to know. A sinus infection can linger around for as long as 2-3 weeks or it can be gone in a matter of days. It depends on how bad the infection is, if it's a viral or bacterial infection, and other facotrs. If you use anti-biotics or a home remedy or nasal irrigation or other remedies you find work for you, it's possible to get rid of a sinus infection in 2-3 days.