Key takeaways:
A sinus infection (sinusitis) is a common upper respiratory infection that can have many of the same symptoms as a cold.
Symptoms of a sinus infection and a cold overlap. But a sinus infection is more likely to cause facial pain, fever, or headache.
The best way to tell the difference between a cold and a sinus infection is by how long the symptoms last. Symptoms of a sinus infection usually last longer than cold symptoms.
Sniffles and coughs are common to many upper respiratory conditions — like colds and sinus infections (sinusitis). That’s why it can be hard to tell which illness you have. Knowing the difference between a cold and a sinus infection will help you get the right treatment.
Let’s take a closer look at the similarities and differences of the cold versus sinus infection, so you can get better faster.
What are the differences between a sinus infection and a cold?
If you’re feeling sick, it can be hard to figure out if you’re dealing with the common cold or a sinus infection. Below, we’ll break down how they’re different.
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Causes
Colds are almost always caused by viruses. There are hundreds of different viruses that cause cold symptoms. The most common type of cold virus is rhinovirus. But other viruses can also cause colds, including COVID-19, flu, and respiratory syncytial virus (RSV).
Sinus infections can also be caused by many different germs. Bacteria, fungi, and viruses can all lead to sinusitis. Most sinus infections can get better without antibiotics. However, some are caused by bacteria and need antibiotics to get better.
Allergies can also lead to sinus infections. This happens when allergies cause inflammation in the narrow sinus passages. If the sinuses are blocked, bacteria can grow, leading to sinusitis. So, people with allergies or colds can develop sinusitis over time.
Symptoms
Symptoms of colds and sinus infections can overlap. So it can be hard to tell which infection you’re dealing with based on only one or two symptoms. But some symptoms can help you tell the difference between sinus infections and colds.
A cold usually has symptoms such as:
Runny nose
Nasal congestion
Cough
Sneezing
Sore throat
A cold can turn into a sinus infection if your sinuses get infected and inflamed. A sinus infection is more likely to have symptoms of:
Facial pain
Headache
Tooth pain
Fever
Bad breath
Duration
Most cold symptoms go away on their own within 7 to 10 days. Coughing due to a cold virus may last a couple of weeks.
Sinus infections can last longer. Acute sinus infections can last anywhere from a few days up to 8 weeks. Chronic sinus infections are less common. They can last even longer than 8 weeks.
So, is it a cold or a sinus infection?
In many cases, you can’t know for sure right away — especially in the first few days, when symptoms overlap. But timing and severity usually let you know what you’re dealing with. If your symptoms are improving within a week, and don’t include fever or significant facial pain, a cold is more likely.
On the other hand, a sinus infection is more likely if your symptoms:
Last longer than 10 days without improvement
Get worse after you seemed to be getting better
Include fever, facial pain, or tooth pain
Good to know: The color of your mucus can’t tell you if you’re having a cold or sinus infection, contrary to popular opinion.
How can I prevent a cold from turning into a sinus infection?
Most sinus infections start with a cold. When your nasal passages become inflamed and clogged, mucus can get trapped in the sinuses. This creates an environment where germs can grow. To help prevent a sinus infection, here are some things to try:
Use saline nasal spray or rinses to keep your nasal sinuses moist and clear.
Use a humidifier or warm showers to relieve nasal dryness and pressure.
Stay well hydrated to help thin mucus and keep it draining.
If you have allergies, take allergy medication to improve your congestion.
Wash your hands often to avoid getting sick in the first place.
Support your immune system with good sleep, nutritious foods, and not smoking.
Quiz: Is it a cold or sinus infection?
Treating a cold vs. sinus infection
Colds and sinus infections usually go away on their own. But there are ways to improve the symptoms and feel better in the meantime. Many cold remedies can help relieve sinusitis symptoms, but not all treatments are useful for both infections.
Here’s a review of the most common ways to treat a cold versus sinus infection.
Treatment | Cold | Sinus infection |
|---|---|---|
Warm facial compress | Yes | Yes |
Saline nasal spray | Yes | Yes |
Pain relievers | Yes | Yes |
Decongestants | Yes | Yes |
Steroid nasal spray | No | Sometimes |
Cough suppressant | Yes | Yes |
Supplements (zinc, vitamin C) | Yes | Yes |
Throat lozenges | Yes | Yes |
Antibiotic | No | Sometimes |
Treating chronic sinusitis
Chronic sinusitis requires a different approach than a cold or typical sinus infection. Beyond the options listed above, treatment often involves targeting the root causes like allergies or nasal polyps.
When to see a healthcare professional for a cold or sinus infection
Most colds and sinus infections can be treated at home. But sometimes you need to see a healthcare professional, who can help determine if you might need treatment with antibiotics.
Here’s when to get a checkup for your symptoms:
Intense headache or facial pain
Symptoms that start to improve but then get worse
Symptoms that last more than 10 days without getting better
Fever that lasts longer than 3 to 4 days
Multiple sinus infections within a year
Difficulty breathing or chest pain
Sudden dizziness
Any symptom that you find concerning
Frequently asked questions
Yes, a cold can lead to a sinus infection, and this happens quite commonly. But a sinus infection doesn’t turn into a cold.
Yes, you can get a sinus infection without having a cold first. Allergies are one of the most common reasons for getting a sinus infection. You can get sinus infections from constant exposure to environmental triggers like cigarette smoke. Blocked sinus cavities can also lead to sinus infections.
The best treatment for a sinus infection depends on the cause. Most sinus infections will go away on their own with treatment for symptoms like pain and fever. Some sinus infections don’t get better on their own and may need an antibiotic. A healthcare professional will help decide which treatment is best for you based on your symptoms, medical history, and a physical exam.
Sinus infections aren’t contagious. But most sinus infections start with a viral cold that creates inflammation in the sinuses. And that virus is contagious to others.
The mucus in a sinus infection is often yellow or green. But not always. The color of your mucus doesn’t tell you much about the type of infection you have. Colds and even allergies can also lead to yellow or green mucus. So mucus color isn’t a good way to tell what kind of infection you have or what treatment you need.
Yes, a cold can lead to a sinus infection, and this happens quite commonly. But a sinus infection doesn’t turn into a cold.
Yes, you can get a sinus infection without having a cold first. Allergies are one of the most common reasons for getting a sinus infection. You can get sinus infections from constant exposure to environmental triggers like cigarette smoke. Blocked sinus cavities can also lead to sinus infections.
The best treatment for a sinus infection depends on the cause. Most sinus infections will go away on their own with treatment for symptoms like pain and fever. Some sinus infections don’t get better on their own and may need an antibiotic. A healthcare professional will help decide which treatment is best for you based on your symptoms, medical history, and a physical exam.
Sinus infections aren’t contagious. But most sinus infections start with a viral cold that creates inflammation in the sinuses. And that virus is contagious to others.
The mucus in a sinus infection is often yellow or green. But not always. The color of your mucus doesn’t tell you much about the type of infection you have. Colds and even allergies can also lead to yellow or green mucus. So mucus color isn’t a good way to tell what kind of infection you have or what treatment you need.
The bottom line
Colds and sinus infections are common illnesses, and their symptoms can overlap. You can usually treat a cold at home with simple over-the-counter (OTC) remedies. Symptoms resolve in about 2 weeks. Sinus infections can last longer and may not resolve on their own without an antibiotic. Get medical attention if your symptoms aren’t getting better or you have a fever, intense headache, or facial pain. Your cold might be turning into a sinus infection.
Why trust our experts?
References
American Academy of Allergy, Asthma & Immunology. (2023). Colds, allergies and sinusitis — How to tell the difference.
Burgstaller, J. M., et al. (2016). Antibiotic efficacy in patients with a moderate probability of acute rhinosinusitis: A systematic review. European Archives of Oto-Rhino-Laryngology.
Centers for Disease Control and Prevention. (2024). Sinus infection basics.
Mäkelä, M. J., et al. (1998). Viruses and bacteria in the etiology of the common cold. Journal of Clinical Microbiology.
