Sinus Infection vs. COVID-19

The two share certain symptoms, but also have differences

Medically reviewed by Sameena Zahoor, MD

The overlap in symptoms between COVID-19 and sinus infections (sinusitis) makes it difficult to tell the two apart. Congestion, headache, fever, sore throat, and cough are some examples of symptoms that the two share.

Despite their overlap, there are some notable differences between sinus infections and COVID-19 as well. Aside from what causes them, this includes another battery of more unique symptoms. A loss of smell or taste is a pretty clear indication its COVID-19, for instance.

This article explains how to tell the difference between a sinus infection and COVID-19. It also details treatment options for both, why a proper diagnosis is important, and when to see your healthcare provider.

Symptoms of Sinus Infection vs. COVID-19

During the pandemic, the general public has become more aware of COVID-19 symptoms. While you may experience a fever, headache, and cough if you have COVID, you can also have these and other respiratory symptoms if you have another infection or condition.

Some symptoms are more common in one condition than the other. For example, shortness of breath and difficulty breathing are more likely with COVID-19, while facial pain is more specific to a sinus infection.

The list of symptoms below is just a starting point and does not include all possible symptoms of COVID-19 or a sinus infection. If you develop any respiratory symptoms that do not seem to improve, it’s important to see a healthcare provider.

Additionally, if you have any symptoms which are in any way associated with COVID-19, you should follow the Centers for Disease Control and Prevention (CDC) guidelines regarding isolation and prevention.

Sinus Infection Symptoms

A sinus infection (sinusitis) occurs when the lining of your sinuses becomes inflamed. This leads to mucus buildup. Two main symptoms of sinus infections include congestion and pain or pressure in your face, nose, or ears.

A sinus infection can have a range of other symptoms as well, though they mostly involve the respiratory system.

Possible signs and symptoms of a sinus infection include:

• Runny nose or cold symptoms that last longer than seven to 10 days

• Drainage down your throat from your nose

• Headaches

• Facial pain (pain or pressure in your cheeks, nose, ears, and forehead, or between your eyes)

• Cough

• Fever

• Bad breath

• Sore throat

• Swelling around the eyes (may get worse in the morning)

Related: Symptoms of a Sinus Infection

COVID-19 Symptoms

The signs and symptoms of COVID-19 often involve the respiratory system, but they can also occur in other parts of the body.

While there is a range of COVID-19 symptoms, some of the most common include:

• Fever or chills

• Cough

• Shortness of breath or difficulty breathing

• Fatigue

• Headache

• Muscle or body aches

• New loss of taste or smell

• Congestion or runny nose

• Sore throat

• Nausea or vomiting

• Diarrhea

Takeaway

Several symptoms of COVID-19 overlap with those of a sinus infection, which means you will not be able to be sure of which condition you have by how you feel alone.

You should test yourself to know for sure if the symptoms you're experiencing are due to COVID-19.

Related: Symptoms of COVID-19

Causes

While COVID-19 and sinus infections share some symptoms, they are caused by completely different things.

Sinus Infection

The cause of a sinus infection is inflammation of the sinuses. Sinus infections most often occur after a cold or an allergy flare-up or in relation to a nasal condition.

For example, the virus that causes the common cold attacks the lining of your sinuses and causes them to swell up. As more mucus is produced, buildup occurs and provides a place for bacteria to grow, which leads to infection.

Related: What Causes Sinus Infections?

COVID-19

COVID-19 is caused by the SARS-CoV-2 virus, a type of coronavirus. The virus spreads from person to person and can cause mild to severe illness. The best way to protect yourself from COVID-19 is to get vaccinated and practice protective measures like wearing a face mask, social distancing, and washing your hands.

Diagnosis

If you have respiratory symptoms, your doctor can use several tests to find out what is causing them—for example, if you have a sinus infection, COVID-19, or another condition.

Sinus Infection Diagnosis

A sinus infection is diagnosed based on your symptoms and an examination of your nose and face. Your doctor might check your mucus or do an imaging test to confirm the diagnosis.

Related: How a Sinus Infection Is Diagnosed

COVID-19 Diagnosis

COVID-19 can only be diagnosed through a test that specifically looks for the SARS-CoV-2 virus in your body. The diagnosis cannot be made just by asking you about your symptoms or by doing an exam because the symptoms can also be caused by other conditions. Additionally, some people who have COVID-19 do not have any symptoms.

If you're experiencing symptoms or believe you may have been exposed to COVID-19, you should take a COVID-19 test to know if it is indeed COVID-19. If you have symptoms, but the results of your home antigen test are negative, the Food and Drug Administration (FDA) recommends you test again in 48 hours.

Related: How Coronavirus (COVID-19) Is Diagnosed

Treatment

The treatments for a sinus infection and COVID-19 are very different. An accurate diagnosis from a healthcare professional is required to ensure that you get the appropriate treatment.

Sinus Infection Treatment

There are several ways to treat a sinus infection. The appropriate treatment for you will depend on what is causing the infection.

For example, if you have a sinus infection that is caused by allergies, your doctor may prescribe an allergy medicine.

Some common sinus infection treatments include:

• Saline nasal spray

• Nasal irrigation (e.g., neti pot)

• Decongestant medicines

• Over-the-counter pain relievers (to relieve aches and fever)

• Allergy medication (if allergies are a cause)

Related: How Sinus Infection Is Treated

Antibiotics

According to the CDC, antibiotics are usually not needed for viral sinus infections.

Your doctor might take a “watchful waiting” approach to see if your immune system can fight the infection. They might also choose “delayed prescribing,” where they prescribe an antibiotic for you but suggest that you wait a few days before taking it to see if the infection clears up on its own.

Healthcare providers try not to prescribe antibiotics unless they are definitely necessary because the over-prescription of antibiotics contributes to the rise of bacteria that is resistant to these drugs.

Related: Antibiotics for Sinus Infection

COVID-19 Treatment

Treatments include a combinations of medications that are approved to treat COVID-19 and new drugs that have emergency-use authorizations to use for COVID-19, and ones that COVID-19 is an off-label use.

The FDA has approved three drugs to treat COVID-19:

• Veklury (remdesivir), an antiviral drug, for adults and children

• Olumiant (baricitinib), and immune modulator, for certain hospitalized adults

• Paxlovid (nirmatrelvir and ritonavir), an antiviral drug, for adults

The FDA has granted emergency-use authorizations to a handful of medications that have not yet completed the formal FDA-approval process. These include:

• Lagevrio (molnupiravir), an oral antiviral medication for people with mild-to-moderate COVID-19 cases and are at high risk of developing severe COVID-19, including hospitalization and death

The best way to treat COVID-19 depends on how sick a person is. For example, if someone has a mild case, they can generally treat their symptoms at home. People with severe COVID-19 illness usually need to be in the hospital, and some end up needing to be in the intensive care unit (ICU).

Another factor in appropriate treatment is a person's risk factors for severe disease. If they have mild to moderate illness and can stay home, but they have certain medical comorbidities, an antiviral treatment may be offered.

Related: COVID-19 Treatments: What You Need to Know

Ways that you can deal with a mild COVID-19 infection at home include:

• Taking medication (ibuprofen or acetaminophen) to reduce fever

• Resting

• Staying hydrated (drinking plenty of water or receiving intravenous fluids, if necessary)

If you are hospitalized with COVID-19, you might be given:

• Antiviral medications

• Medications to treat complications (e.g., blood thinners to treat blood clots)

• Treatments to reduce an overactive immune response and/or support the body’s immune function

Prevention

There are certain things you can do to prevent sinus infections and protect yourself from the COVID-19 virus. Some steps that you can take will help reduce your risk of either condition, but each also has specific precautions that will help lower your risk.

Preventing Sinus Infection

A sinus infection often follows a viral infection, such as a cold or the flu. Therefore, preventing a sinus infection often means trying to avoid the illnesses that usually precede it.

For example, make sure you wash your hands often and try not to touch your face, nose, or eyes during cold/flu season. It’s also important to avoid being around people who are sick.

Getting a flu shot will help protect you from the flu virus, which can cause inflammation in your sinuses and lead to a sinus infection.

If you have allergies, figuring out your triggers and trying to avoid them will help prevent a flare-up of symptoms that could lead to a sinus infection.

Related: Have Spring Allergies? Your Face Mask Can Help

Preventing COVID-19

COVID-19 is a viral infection, which means that many of the same steps that you would take to protect yourself from a cold or the flu (such as washing your hands and avoiding people who are sick) can help lower your risk of getting the virus.

The CDC recommends that if you develop symptoms, you should stay home until your symptoms, including fever, improve for 24 hours without the use of fever-reducing drugs. You should then continue to take precautions for the next five days.

There are also other precautions that you should take not just to protect yourself from COVID-19 but to help ensure that you do not spread the virus to other people.

COVID-19 precautions include:

• Stay up to date with COVID-19 vaccines

• Get tested for COVID-19

• Stay home if you have (or think you have) COVID-19

• Avoid contact with people who have suspected or confirmed COVID-19

• Maintain social distance (six feet apart) between you and people who do not live with you

• Avoid crowds and indoor spaces with poor ventilation

• Wash your hands properly and often

• Clean and disinfect high-touch surfaces in your home and/or workplace daily

Related: How To Protect Yourself From New COVID-19 Variants

Summary

COVID-19 and sinus infections both involve the respiratory system. The two conditions can have symptoms that overlap, but some symptoms are more likely to occur in one and not the other.

Sinus infections and COVID-19 are not caused by the same things. COVID-19 is caused by the SARS-CoV-2 virus. A sinus infection can happen after a viral illness but can also be caused by allergies.

The treatments for each condition are also different, which is why it’s important to see a doctor and get an accurate diagnosis. You might need antibiotics for a sinus infection that does not get better on its own with home remedies or over-the-counter medications.

If you have a mild case of COVID-19, you might be able to rest at home and avoid other people until you recover. However, if you develop severe illness, you may need to receive medical care in the hospital.

A Word From Verywell

If you have respiratory symptoms, you might fear that you have COVID-19. While it’s possible that you have the virus, your symptoms could also be caused by another condition, such as a cold or a sinus infection. The only way to know for sure is to take a COVID-19 test as soon as you start to feel sick.

Frequently Asked Questions

What’s the main difference between sinus infection and COVID-19?

The main difference between COVID-19 and a sinus infection is what causes them. A sinus infection is caused by inflammation of the sinuses and often follows a cold or allergy flare-up. COVID-19 is only caused by the SARS-CoV-2 virus.

How can you tell if you have a sinus infection or COVID-19?

You cannot tell if you have COVID-19 or a sinus infection just based on your symptoms alone, especially because so many overlap. The only way to know what you have for sure is to take a COVID-19 test.

Are you contagious before COVID-19 symptoms appear?

Yes. In general, people are contagious for two to three days before COVID-19 symptoms start.

How long are you most contagious after a COVID-19 infection?

COVID-19 is most contagious in the 48 hours before symptoms start and the first five days of symptoms. Asymptomatic cases of COVID-19 are considered contagious for five days after a positive test.

Related: Is it Allergies or COVID-19?

The information in this article is current as of the date listed, which means newer information may be available when you read this. For the most recent updates on COVID-19, visit our coronavirus news page.

Read the original article on Verywell Health.