Getting sick around the holidays is never fun. A bad cold or flu can cause you to miss out on meals with friends, workplace parties and trips to the Chapungu Sculpture Park for the light displays. With so much on the table, it’s crucial to know what conditions are and aren’t contagious. With sinus infections, that question can be a little tricky.
When is a Sinus Infection Contagious?

Technically, a sinus infection itself is never contagious. That’s because the infection refers to an inflammation of your sinuses, not a specific virus or bacteria. The contagious part comes in based on the cause of a sinus infection and how long ago the cause developed.
For example, many sinus infections arise from a bad cold or flu. A cold can be contagious for up to two weeks, reaching its most contagious when your symptoms are at their worst. So, if you had a cold three weeks ago, for example, but the cold turned into a sinus infection, you’re not likely to spread it, though it’s still possible.
If your sinus infection arises from allergies or structural issues like a deviated septum or nasal polyps (small, benign growths in the nose), it isn’t contagious, and you can attend holiday events as long as you feel up for it.
How Can I Make Sure I Don’t Spread a Virus or Bacteria?
The best way to avoid spreading the underlying cause of a sinus infection is to let the illness run its course. For a cold, that means at least two weeks after you notice symptoms. For the flu, you’re most contagious about three to four days after your symptoms start.
You can avoid spreading viruses and bacteria by washing your hands frequently, wearing a mask when outside your home and avoiding the sharing of food or drink. If you have a family member or friend with a weakened immune system, let them know when your symptoms arise so they can decide if they’re comfortable attending events.
Nobody likes getting sick around the holidays. Take care of your health by treating illnesses promptly and avoiding large gatherings with people who are ill. For more information on identifying or managing sinus infections, contact Alpine Ear Nose & Throat PC today.