Are Sinus Infections Contagious?

Sinus infections are contagious only if they are caused by a virus, rather than bacteria, fungi, allergies, or other causes. Here's what you should know.

The sinuses are cavities above your eyebrows and in your upper cheeks. When your immune system is active, they can swell, creating discomfort.

Usually, the problem begins with a cold or flu virus. Even after you stop sneezing, you might have pain in your sinuses. Your symptoms should typically last no more than 10 days.

The medical term for this problem is rhinosinusitis or sinusitis. But sinusitis may have other causes, particularly allergies.

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What are the symptoms of sinusitis?

You may have any of the following symptoms:

• Pain or pressure on your forehead, between your eyes, on the sides of your nose, or at your upper jaw
• Thick, yellow, green, or cloudy discharge from your nose
• Headache
• Runny or congested nose
• Loss of smell
• Postnasal drip, mucus going down your throat
• Sore or irritated throat
• Cough
• Bad breath
• Fever
• Fatigue

If symptoms last for 12 weeks, you have what’s known as chronic sinusitis.

Is it allergies or something else?

If you have itchy eyes, suspect allergies. If the problem comes in the spring or fall every year, that’s another big clue.

Allergies can develop at any time. That’s why over-the-counter hair dyes instruct you to do a skin allergy test each time you use one.

If you have fever, bad breath, and a thick yellow or green mucus, the problem is probably not allergies.

Are sinus infections contagious?

Sinus infections are contagious only if they’re caused by a virus. You can spread the virus to other people, but they may not end up with clogged sinuses like yours.

Viruses spread when you cough or sneeze, sending tiny drops of mucus into the air. The virus-loaded drops land on the mouths and noses of other people. The drops can also land on metal or plastic surfaces other people touch, like a doorknob or subway pole, where they can live for longer than a day.

To avoid spreading your virus, don’t share food or utensils or kiss anybody. When you sneeze or cough, try to send the germs into a tissue or the inside of your elbow. If you sneeze into your hand, make sure you wash your hands right away.

Other causes of sinusitis

Besides allergies, the other possible causes are bacteria, fungi, and growths or structural problems in your nose.

Bacterial and fungal infections require medication. Those types of infections aren’t contagious.

If you have more than one period of uncomfortable sinuses over a year, talk to your doctor. You may have nasal polyps or a tumor, growths in the nose.

You may have a deviated septum. The septum is the wall between your nasal passages. Even if your nose doesn’t look crooked, the wall inside may be crooked or off-center. It requires surgical correction.

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