Is Bacterial Sinusitis Contagious?

Bacteria can also cause sinus infections, but these infections aren't contagious. You can't spread them to other people. Bacterial sinus infections are less common.

Can you catch a bacterial sinus infection?

Bacteria. Bacteria or fungi can also cause sinus infections when they are trapped in the nasal and sinus passages. However, these infections are not contagious and can't be spread to others.

How long are you contagious when you have a sinus infection?

A sinus infection caused by a viral infection lasts about seven to 10 days, meaning you'll be contagious with the virus for up to two weeks. If your symptoms last more than 10 days, or if they subside after a week then return again a few days later, you likely have a bacterial sinus infection that cannot be spread.