Are sinus infections contagious? “Because many times sinus infections are caused by viruses, they can be contagious like other infections, such as colds,” Melinda said. “If you have a sinus infection, it's important to use good hygiene skills.

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.

Should you stay home with a sinus infection?

Sinus infections can be viral or bacterial. “Either way, it's best to stay home,” Wigmore says. Viral sinus infections are often contagious. If you have had symptoms longer than one week, or if you have severe facial pain, teeth/jaw pain, or fever, you may have a bacterial infection and should consult your doctor.