Medically Reviewed By: Mark Aquino, NP – Urgent Care Nurse Practitioner, author of Physical Assessment for Nurses Simplified. This article is based on real-world urgent care experience and current clinical guidelines.
A stuffy nose, facial pressure, headache, and thick nasal drainage can make it feel like you have a sinus infection. But having sinus symptoms does not necessarily mean you have a bacterial infection—or that you need an antibiotic.
Most cases of acute sinusitis, also called acute rhinosinusitis, are caused by viruses, often following a common cold. Inflammation causes the tissues inside the nose and sinuses to swell, which interferes with normal mucus drainage and can lead to congestion, facial pressure, and nasal discharge.[1,2]
In fact, the Centers for Disease Control and Prevention (CDC) estimates that 90% to 98% of acute rhinosinusitis cases are viral.[3]
The important question, then, isn’t simply whether you have sinus symptoms. It’s whether your symptoms are following the expected course of a viral illness or showing features that warrant evaluation for a bacterial sinus infection or another condition.
This guide explains sinus infection symptoms, viral versus bacterial sinusitis, home treatment, when antibiotics may be appropriate, and the warning signs that mean you should seek medical care.
Medical disclaimer: This article is for general educational purposes only and is not a substitute for individualized medical advice, diagnosis, or treatment from a qualified healthcare professional. Seek prompt medical attention for severe, rapidly worsening, or concerning symptoms.
What Is a Sinus Infection?
Your sinuses are air-filled spaces located within the bones around your nose, cheeks, forehead, and eyes.
Normally, mucus produced within these spaces drains through small openings into the nasal passages.
When the lining of the nose and sinuses becomes inflamed and swollen, those drainage pathways can become narrowed or blocked. Mucus accumulates, creating the congestion and pressure commonly associated with sinusitis.[1]
The medical term for this inflammation is sinusitis or rhinosinusitis.
Viruses cause most acute sinus infections, although bacteria can sometimes be responsible.[2,3]
What Are the Symptoms of a Sinus Infection?
Common sinus infection symptoms include:[1,2]
- Stuffy or blocked nose
- Runny nose
- Thick nasal drainage
- Postnasal drip
- Facial pain or pressure
- Pressure around the cheeks, forehead, nose, or eyes
- Headache
- Reduced sense of smell
- Cough
- Sore throat
- Ear pressure
- Upper tooth discomfort
- Bad breath
- Fatigue
- Fever in some cases
Some people notice that facial pressure becomes worse when bending forward.
However, these symptoms are not exclusive to bacterial sinus infections. Viral respiratory infections and allergies can produce many of the same symptoms.
Viral vs. Bacterial Sinus Infection
This distinction is important because antibiotics treat bacterial infections, not viral infections.
Viral sinusitis
Most cases of acute sinusitis are associated with viral respiratory infections such as the common cold.[1,3]
Symptoms may include:
- Nasal congestion
- Runny nose
- Facial pressure
- Headache
- Postnasal drainage
- Cough
- Fatigue
Symptoms typically begin improving as the viral illness resolves.
Bacterial sinusitis
A bacterial infection can occasionally develop during or after a viral respiratory infection.
Rather than relying on a single symptom such as mucus color, clinicians look at the duration, severity, and progression of symptoms.
The CDC describes three important patterns that can suggest acute bacterial rhinosinusitis:[3]
1. Persistent symptoms
Symptoms continue for more than 10 days without improvement.
2. Severe symptoms
Symptoms are severe for several days, such as significant fever accompanied by purulent nasal discharge or facial pain.
3. Worsening after initially improving
A person starts recovering from what appears to be a viral illness but then develops worsening congestion, drainage, cough, fever, or facial symptoms.
This is sometimes called “double worsening.”
The pattern of illness is therefore often more informative than mucus color alone.
Does Green or Yellow Mucus Mean You Need Antibiotics?
No.
Yellow or green mucus does not automatically mean you have a bacterial sinus infection.
Mucus can change color during viral respiratory infections because of inflammatory cells and other components accumulating within nasal secretions.
Therefore:
Green mucus does not equal bacterial sinusitis.
And:
Green mucus does not automatically mean antibiotics are necessary.
A healthcare professional should consider the entire clinical picture, including symptom duration, severity, progression, fever, facial symptoms, examination findings, medical history, and risk factors.
What Does a Sinus Infection Feel Like?
Many people describe sinusitis as a combination of:
Congestion + facial pressure + drainage
You might experience pressure across your forehead, underneath your eyes, or over your cheeks while simultaneously having difficulty breathing through your nose.
Inflammation of the maxillary sinuses—the sinus cavities located around the cheek area—can sometimes produce discomfort that feels like it is coming from the upper teeth.
Postnasal drainage can also irritate the throat and trigger coughing.
Can a Sinus Infection Cause a Headache?
Yes.
Inflammation and pressure around the sinus cavities can contribute to facial discomfort and headache.[1]
However, not every headache associated with congestion is actually caused by sinusitis.
Migraine can sometimes produce facial pressure, nasal symptoms, and headache that people mistake for a “sinus headache.”
A headache that is unusually severe, rapidly worsening, different from your usual headaches, or accompanied by neurologic symptoms should be medically evaluated.
Can a Sinus Infection Cause Ear Pain or Pressure?
Yes.
Inflammation involving the nose and upper respiratory tract can interfere with normal Eustachian tube function. These tubes help regulate pressure between the middle ear and the back of the nose.
This can result in:
- Ear fullness
- Popping
- Pressure
- Muffled hearing
- Mild ear discomfort
However, significant or worsening ear pain—particularly with fever, ear drainage, or substantial hearing changes—could represent a separate middle-ear problem.
If ear pain becomes the predominant symptom, see our Ear Infection: Symptoms, Treatment, and When to Seek Care guide for the signs that may suggest an actual ear infection.
Can a Sinus Infection Cause a Sore Throat?
Yes.
A common reason is postnasal drip.
Mucus draining from the nose down the back of the throat can irritate the tissues and cause:
- Scratchiness
- Throat clearing
- Coughing
- Mild pain when swallowing
However, sore throat has many other causes, including viral infections, strep throat, tonsillitis, irritation, and other conditions.
If throat pain is one of your primary symptoms, read Sore Throat: Causes, Treatment, and When to Worry for additional warning signs and guidance on when testing or medical evaluation may be appropriate.
Can a Sinus Infection Cause a Dry Cough?
Yes.
Postnasal drainage can irritate the throat and trigger coughing even when little or no mucus is being coughed up.
This can be particularly noticeable at night because drainage may collect in the throat while lying down.
However, persistent coughing should not automatically be blamed on sinusitis. Asthma, respiratory infections, reflux, medication effects, and other conditions can also cause a dry cough.
For more detail, see Dry Cough: Causes, Treatment, and When to Seek Care.
Are Sinus Infections Contagious?
The answer depends on what caused the sinusitis.
Sinusitis itself is generally not something that you directly “catch” from another person.
However, the respiratory virus responsible for many cases of acute sinusitis can be contagious.
For example, someone may spread a cold virus to another person. That second person might then develop a cold and subsequently experience sinus inflammation.
Basic respiratory-infection precautions can help reduce transmission, including:
- Washing your hands
- Covering coughs and sneezes
- Avoiding unnecessary close contact when actively ill
- Avoiding sharing items contaminated with respiratory secretions
How Is a Sinus Infection Diagnosed?
Most uncomplicated cases of acute sinusitis are diagnosed based on symptoms and a physical examination.
A healthcare professional may ask:
- When did the symptoms begin?
- Are they improving or worsening?
- Did you improve before becoming sick again?
- Have symptoms lasted more than 10 days?
- Do you have a fever?
- Where is the facial pressure or pain?
- What does the nasal drainage look like?
- Are symptoms primarily on one side?
- Have you had repeated sinus infections?
- Do you have allergies?
- Do you have dental problems?
The examination may include the nose, throat, ears, face, eyes, and surrounding structures.
Imaging such as a CT scan is generally not routinely necessary for uncomplicated acute sinusitis. It may be considered when another diagnosis or a complication is suspected.[4]
How Is a Sinus Infection Treated?
Treatment depends on the suspected cause, severity, duration, and individual patient’s health.
Because most acute sinus infections are viral, treatment often focuses on symptom relief while the illness resolves rather than immediately prescribing antibiotics.[2,3]
Saline Nasal Irrigation
Saline can help rinse mucus and debris from the nasal passages.
Options include:
- Saline nasal sprays
- Squeeze-bottle irrigation systems
- Neti pots
However, the water used for nasal irrigation matters.
The FDA advises against using untreated tap water for nasal rinsing because organisms that are harmless when swallowed can potentially cause serious infection when introduced into the nasal passages.[5]
Use:
- Distilled water
- Sterile water
- Appropriately boiled and cooled water
Also keep the irrigation device clean and follow the manufacturer’s directions.
Intranasal Corticosteroid Sprays
Nasal corticosteroid sprays can decrease inflammation within the nasal passages.
Examples include medications containing:
- Fluticasone
- Budesonide
- Mometasone
These can be particularly helpful when nasal inflammation or allergies contribute to symptoms.[4]
Nasal steroids generally work better when used correctly and consistently rather than expecting immediate relief after a single dose.
Follow the product directions or recommendations from your healthcare professional.
Pain and Fever Relief
For people who can safely take them, medications such as:
- Acetaminophen
- Ibuprofen
may help relieve headache, facial discomfort, and fever.[4,6]
However, over-the-counter does not mean risk-free.
Medication selection may need to be modified for people with:
- Kidney disease
- Liver disease
- Stomach ulcers
- Bleeding disorders
- Anticoagulant use
- Certain cardiovascular conditions
- Pregnancy
- Medication allergies
Children also require age- and weight-appropriate medication selection and dosing.
Warm Compresses
Applying a warm compress over the nose, cheeks, or forehead may temporarily reduce facial discomfort and sinus pressure.[2]
A warm shower may also provide temporary relief from congestion.
Fluids and Rest
Adequate hydration and rest can support recovery from the respiratory illness causing sinus inflammation.
Fluids may also help keep secretions easier to clear.
What About Decongestants?
Decongestants may temporarily improve nasal congestion in some people.
However, they aren’t appropriate for everyone.
Oral decongestants may be problematic for people with certain conditions, including some cardiovascular problems or uncontrolled hypertension.
Topical nasal decongestant sprays can also cause rebound congestion when used longer than recommended.[4]
If you have chronic medical conditions, take prescription medications, are pregnant, or are unsure whether a decongestant is appropriate, ask a healthcare professional or pharmacist before using one.
Do You Need Antibiotics for a Sinus Infection?
Often, no.
The CDC reports that approximately 90% to 98% of acute rhinosinusitis is viral.[3]
Antibiotics cannot treat viral infections.
Even when uncomplicated acute bacterial sinusitis is suspected, some patients may be candidates for watchful waiting rather than immediately beginning an antibiotic, provided appropriate follow-up is available.[3,7]
The 2025 American Academy of Otolaryngology–Head and Neck Surgery adult sinusitis guideline continues to emphasize appropriate diagnosis and judicious antibiotic use.[7]
When Might Antibiotics Be Considered?
A clinician may become more suspicious of bacterial sinusitis when symptoms follow patterns such as:[3]
- More than 10 days without improvement
- Severe symptoms for several days
- Significant fever with purulent nasal discharge or facial pain
- Worsening after initially improving
When antibiotics are appropriate, the specific medication depends on factors such as:
- Medication allergies
- Age
- Pregnancy
- Kidney function
- Previous antibiotic exposure
- Local bacterial resistance
- Severity of illness
- Other medical conditions
For adults with acute bacterial rhinosinusitis, CDC guidance lists amoxicillin or amoxicillin-clavulanate as first-line therapy in appropriate patients.[3]
This does not mean everyone with sinus pressure should request these medications.
Antibiotic selection should be individualized by the treating healthcare professional.
Why Not Take Antibiotics “Just in Case”?
Because antibiotics have potential harms.
Possible adverse effects include:
- Nausea
- Diarrhea
- Rash
- Allergic reactions
- Yeast infections
- Clostridioides difficile infection
- Drug interactions
Unnecessary antibiotic exposure also contributes to antimicrobial resistance.[2,8]
The goal is not to avoid antibiotics when they’re necessary.
The goal is to use antibiotics when their expected benefits outweigh their risks.
Never take leftover antibiotics or another person’s prescription.
When Should You See a Healthcare Provider?
Consider medical evaluation if you have:[2,3]
- Symptoms lasting more than 10 days without improvement
- Symptoms that improve and then become significantly worse
- Severe facial pain
- Severe headache
- Fever lasting several days
- Repeated sinus infections
- Symptoms that continue for weeks
- Significant dental pain
- Significant ear pain
- An underlying condition that weakens your immune system
A healthcare professional can help determine whether your symptoms are more consistent with viral sinusitis, bacterial sinusitis, allergies, migraine, dental disease, or another condition.
When Is a Sinus Infection an Emergency?
Most sinus infections are uncomplicated.
Rarely, however, infection can spread beyond the sinuses and involve structures around the eyes, bones, or central nervous system.[1]
Seek urgent or emergency medical attention for sinus symptoms accompanied by:
- Swelling or redness around an eye
- Significant eyelid swelling
- Double vision
- New vision changes
- Loss of vision
- Severe or rapidly worsening headache
- Confusion
- Altered mental status
- Stiff neck
- Significant forehead swelling
- New neurologic symptoms
- Severe or rapidly worsening illness
These symptoms should not be treated solely with home remedies.
Acute vs. Chronic Sinusitis
The duration of symptoms matters.
Acute sinusitis
Acute sinusitis occurs over a relatively short period and is commonly associated with a viral respiratory infection.
Many uncomplicated cases improve within approximately 7 to 10 days.[1]
Chronic sinusitis
Chronic sinusitis involves symptoms lasting at least 12 weeks.[9]
Chronic sinusitis is therefore not simply a cold that has lasted several extra days.
Potential contributing factors can include:
- Persistent inflammation
- Allergies
- Nasal polyps
- Structural abnormalities
- Recurrent infections
- Other underlying conditions
Persistent or repeatedly recurring symptoms may warrant additional evaluation, sometimes including an ear, nose, and throat specialist.
What Else Can Feel Like a Sinus Infection?
Not every case of congestion and facial pressure is sinusitis.
Several conditions can produce similar symptoms.
Common cold
Viral respiratory infections frequently cause congestion, drainage, headache, coughing, and facial pressure.
Allergic rhinitis
Allergies can cause:
- Nasal congestion
- Sneezing
- Clear nasal drainage
- Itchy nose
- Itchy or watery eyes
Migraine
Migraine can cause forehead or facial pain and may sometimes be mistaken for a sinus headache.
Dental infection
Problems involving the upper teeth can produce pain that radiates toward the cheek or maxillary sinus region.
Ear disorders
Eustachian tube dysfunction and middle-ear disease can produce pressure and discomfort that overlap with upper respiratory symptoms.
Persistent, severe, recurrent, or unusual symptoms deserve proper evaluation rather than repeatedly assuming sinus infection.
How Long Does a Sinus Infection Last?
Many uncomplicated cases of acute viral sinusitis improve within approximately one week to 10 days.[1]
Not every symptom disappears simultaneously.
Congestion and coughing may linger while the overall illness gradually improves.
The direction of symptoms is important.
Generally reassuring:
Symptoms are gradually improving.
More concerning:
Symptoms are not improving after approximately 10 days.
Also concerning:
Symptoms begin improving but then become substantially worse again.
That change in trajectory may warrant medical evaluation.
Frequently Asked Questions About Sinus Infections
What are the first signs of a sinus infection?
Common early symptoms include congestion, nasal drainage, facial pressure, postnasal drip, reduced sense of smell, headache, and cough. These symptoms can also occur during an ordinary viral cold.
How do I know if my sinus infection is bacterial?
There is no reliable way to diagnose bacterial sinusitis from mucus color alone. Clinicians consider symptom duration, severity, progression, examination findings, and whether symptoms became worse after initially improving.[3]
Does green mucus mean I need antibiotics?
No. Yellow or green nasal drainage can occur with viral infections and does not by itself prove that the infection is bacterial.
Are sinus infections contagious?
The sinus inflammation itself generally isn’t directly contagious, but the respiratory virus that caused it may be.
Can you have a sinus infection without a fever?
Yes.
Fever is not required for sinusitis, and many people with acute sinus symptoms do not develop one.
Can sinusitis cause tooth pain?
Yes.
Inflammation involving the maxillary sinuses can produce discomfort perceived in the upper teeth.
However, dental infections can also mimic sinus pain. Persistent or localized tooth pain should therefore be evaluated appropriately.
Can a sinus infection cause dizziness?
Sinus and upper respiratory congestion can sometimes accompany sensations of ear pressure or imbalance, but significant or persistent dizziness has many potential causes and should not automatically be attributed to sinusitis.
What is the fastest way to get rid of a sinus infection?
There isn’t a treatment that instantly eliminates uncomplicated sinusitis.
Many viral cases resolve naturally. Depending on the individual, saline irrigation, nasal corticosteroids, appropriate pain medication, hydration, rest, and other supportive measures may reduce symptoms while recovery occurs.[2,4]
When should I worry about sinus pressure?
Seek medical attention for severe, persistent, or rapidly worsening symptoms—particularly sinus symptoms accompanied by swelling around an eye, vision changes, severe headache, confusion, stiff neck, or neurologic symptoms.
The Bottom Line
A sinus infection, or sinusitis, can cause nasal congestion, facial pressure, headache, thick drainage, postnasal drip, cough, fatigue, and sometimes fever.
But most acute sinus infections are viral, not bacterial.[2,3]
That means antibiotics are frequently unnecessary.
Instead of relying on mucus color, pay attention to the pattern of the illness.
Symptoms lasting more than about 10 days without improvement, severe symptoms, or symptoms that improve and then become significantly worse can warrant evaluation for bacterial sinusitis or another condition.[3]
For uncomplicated cases, treatments such as saline irrigation, nasal corticosteroids when appropriate, hydration, rest, and pain control may provide symptom relief.
And while serious sinus complications are uncommon, symptoms such as eye swelling, vision changes, confusion, stiff neck, neurologic changes, or a severe rapidly worsening headache require prompt medical attention.
References
- Mayo Clinic. Acute sinusitis: Symptoms and causes. Mayo Foundation for Medical Education and Research.
Mayo Clinic — Acute Sinusitis Symptoms and Causes - Centers for Disease Control and Prevention. Sinus Infection Basics. Updated April 17, 2024.
CDC — Sinus Infection Basics - Centers for Disease Control and Prevention. Outpatient Clinical Care for Adults: Acute Rhinosinusitis. CDC Antibiotic Prescribing and Use.
CDC — Adult Outpatient Sinusitis Guidance - Mayo Clinic. Acute sinusitis: Diagnosis and treatment. Mayo Foundation for Medical Education and Research.
Mayo Clinic — Acute Sinusitis Diagnosis and Treatment - U.S. Food and Drug Administration. Is Rinsing Your Sinuses With Neti Pots Safe?
FDA — Safe Sinus Rinsing - Mayo Clinic. Acute sinusitis: Do over-the-counter treatments help? Updated January 18, 2024.
Mayo Clinic — OTC Treatments for Acute Sinusitis - American Academy of Otolaryngology–Head and Neck Surgery Foundation. Clinical Practice Guideline: Adult Sinusitis Update. Published 2025.
AAO-HNS — 2025 Adult Sinusitis Guideline - Centers for Disease Control and Prevention. Healthy Habits: Antibiotic Do’s and Don’ts. Updated September 23, 2025.
CDC — Antibiotic Do’s and Don’ts - Mayo Clinic. Chronic sinusitis: Symptoms and causes. Mayo Foundation for Medical Education and Research.
Mayo Clinic — Chronic Sinusitis
About the author: Mark Aquino MSN, FNP-C. Mark has a Masters of Science in Nursing from West Coast University and is a board certified family nurse practitioner with over 8 years of real world experience in healthcare and currently practicing in urgent care diagnosing and prescribing treatments in California, USA. He is author of the book Physical Assessment for Nurses Simplified.