Are Sinus Infections Contagious? Can You Spread it?

Medically reviewed by Dr. Marsha Dunkely


Worried that your sinus infection and stuffy nose might be contagious? Here is a blog that will help you better understand. In general, sinus infections can be contagious if viruses cause them. These viral sinus infections can be transmitted through sneezing, talking, or coughing. However, although less common, bacterial sinus infections are typically not contagious. Bacterial sinus infections often occur as a secondary infection following a viral infection or as a result of other factors such as allergies or structural issues in the sinuses. Good hygiene, such as regular hand washing and covering when coughing or sneezing, prevents the spread of sinus infections.

Are Sinus Infections Contagious?

Sinusitis or sinus infections can be difficult to tolerate as they cause a pressure feeling on your face and makes you wonder if you can transfer it to other members of your family or friends. 

The reply is yes. However, a lot will rely on what triggered it. You frequently don’t know.


Here the question arises: are viral sinus infections contagious?

The answer is yes. Viruses often cause sinus infections; they can be contagious like other infections, such as colds. If you have a sinus infection, using good hygiene skills is essential. Wash your hands, cough, sneeze into the crook of your elbow, and wipe down frequently touched objects like light switches and door knobs with disinfectant wipes. Additionally, while you may be contagious briefly, avoid contact with your healthy family members.


Bacteria can develop and lead to an infection when the sinuses are congested and mucus-filled. You are more likely to have bacterial sinusitis if your sinus infection persists for more than 10 to 14 days. If bacteria are the source of your infection, you cannot spread it.

Other Causes

Chronic sinusitis may last for at least 12 weeks and affects some people. Allergies are frequently to blame. Your risk increases if you have polyps in your nose or a deviated septum (a crooked wall separating your nostrils).

Sinusitis can occasionally be brought on by cigarette smoke, dry air, or polluted air.

It’s best to avoid direct contact with others and to schedule a visit with your doctor because you might not know what is causing your sinusitis.

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Are Sinus Infections From Allergies Contagious?

Sinus infections resulting from allergies are generally not contagious. When the immune system reacts to pollen, dust mites, or pet dander, allergies develop. Allergy-related sinus inflammation, often known as allergic rhinitis or hay fever, can result from allergies. If left untreated, allergic rhinitis can sometimes progress to a sinus infection. However, the sinus infection is not contagious because a viral or bacterial agent does not cause it. It is important to note that while the sinus infection itself may not be contagious if an individual with it has other symptoms like a common cold or flu, those accompanying illnesses may be infectious.

Is Chronic Sinusitis Contagious?

Chronic sinusitis is typically not contagious. Chronic sinusitis is a persistent inflammation of the sinuses that lasts for at least 12 weeks, often caused by ongoing issues such as allergies, nasal polyps, or structural abnormalities. Unlike acute sinusitis, commonly caused by viral or bacterial infections and can be contagious, chronic sinusitis is not typically associated with an infectious agent. It is more likely a result of underlying non-infectious factors. However, it’s important to note that the acute disease may be contagious if an acute infection, such as a bacterial superinfection, accompanies chronic sinusitis. In such cases, the contagiousness would be related to the critical illness rather than the chronic sinusitis.

Having Persistent Sinusitis? Discuss With a Doctor Now.

How Long Is A Sinus Infection Contagious?

The contagious period for a viral sinus infection usually lasts as long as the person is experiencing symptoms. Depending on the infection’s intensity and the patient’s immunological response, this could take a few days to several weeks. During this time, the infected person must practice good hygiene habits to reduce the risk of spreading the disease to others.

Although the infectious phase is typically shorter than a viral infection, a sinus infection caused by bacteria may also be contagious. Antibiotics can be used to treat bacterial sinus infections, which can help to decrease the illness’s duration and lower the likelihood that it will spread to other people.

Once people have been on antibiotics for at least 24 hours and their symptoms have improved, they are usually no longer contagious. However, completing the entire course of antibiotics as a healthcare provider prescribes is crucial, even if symptoms improve before the medication is finished.

Should I Stay Home If I Have A Sinus Infection?

Sinus infections can cause various symptoms, including nasal congestion, facial pain or pressure, headaches, and coughs. These symptoms can be caused by a viral or bacterial infection or other factors such as allergies or environmental irritants.

If you have a sinus infection, whether or not you should stay home depends on several factors, including the severity of your symptoms, the type of infection you have, and your circumstances.

Acute Viral Sinusitis

If the sinus infection is caused by a viral infection, such as the common cold, consider staying home until your symptoms improve. As long as you are having symptoms, which may last from a few days to many weeks, viral sinus infections are typically contagious. If someone works in a field that requires frequent contact with others, such as healthcare or child care, being at home can help lower the risk of infecting others.

Your doctor may suggest medications to assist in treating your sinus infection if a bacterial infection is to blame. But it’s essential to remember that antibiotics only work against bacterial illnesses—they do not affect viral infections. Antibiotics won’t help if a virus causes your sinus infection, so you may still want to think about remaining in until your symptoms subside.

Acute Bacterial Sinusitis

Even if you have started taking antibiotics for a bacterial sinus infection, staying home until your symptoms have improved is a good idea. This can help prevent the spread of the disease to others and allow you to rest and recover more quickly.

If you have a job or attend school, following your employer’s or school’s guidance regarding staying home due to illness is crucial. Some workplaces and schools have policies requiring employees or students to stay home if they are experiencing specific symptoms, such as a fever or respiratory symptoms.

Worried About a Stuffed Nose and Difficulty Breathing? Consult a Doctor Now

Is A Sinus Infection Contagious While On Antibiotics?

If you have a bacterial sinus infection and are taking antibiotics, you may still be contagious until the antibiotics have had a chance to work and eliminate the disease. Antibiotics treat bacterial illnesses; they are ineffective against viral infections.

When you have an infection with a bacterial sinus infection, the bacteria can spread to others through respiratory droplets, such as when you cough or sneeze. You may still be contagious even when taking antibiotics until the bacteria eliminates.

The length of your infectious period might change based on various factors, such as the severity of your infection, the type of bacteria causing the illness, and how your immune system reacts. Even if you begin to feel better, it is better to keep taking antibiotics to ensure the infection eliminates and lower the chance of spreading it to others.

If you have a job or attend school, following your employer’s or school’s guidance regarding staying home due to illness is crucial. Some workplaces and schools have policies requiring employees or students to stay home if they are experiencing specific symptoms, such as a fever or respiratory symptoms.


Can I go to work with a sinus infection?

If your symptoms are mild and you work in a low-risk job, you can go to work. However, if you have severe symptoms or work in a high-risk job, such as healthcare, it is best to stay home to avoid spreading the infection. Practicing basic hygiene is crucial to lessen the chance of spreading the disease.

Is Post Nasal Drip Contagious?

Post-nasal drip is not contagious. It is caused by excess mucus accumulation in the back of the throat and can result from various conditions, including allergies, sinus infections, and colds. However, the underlying diseases that cause post-nasal drip, such as colds or sinus infections, may be contagious and spread through respiratory droplets.

How can you tell if a sinus infection is viral or bacterial?

Symptoms of viral sinus infections, which frequently accompany colds, can include nasal congestion, runny nose, and sore throat. Infection caused by a virus usually lasts for a week. The symptoms of bacterial sinus infections are often more severe. These include thick, colored nasal discharge, pressure and pain in the face, and fever. Bacterial sinus infection lasts for 7 to 10 days or even longer.

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