A sinus infection rarely announces itself. It usually shows up as pressure behind the eyes or cheeks that gets worse when you bend forward, a nose that will not stop running or feels completely blocked, and a face that simply aches. Adults often describe it as a bad cold that has settled into the face and refuses to leave.
Those three symptoms — facial pressure or pain, nasal congestion, and a thick or discolored runny nose — are the core signs of sinusitis in adults. Doctors call the condition sinusitis; “sinus infection” is the everyday term. The symptoms can be caused by a virus, bacteria, or a non-infectious trigger like allergies, and the pattern of how they develop over time is often what helps tell them apart.
What Are The Symptoms Of A Sinus Infection In Adults?
The classic symptoms cluster around the nose, face, and head. Not every adult gets all of them, but most people have several at once.
- Facial pain or pressure in the cheeks, forehead, or around the eyes
- Nasal congestion or a blocked nose
- Thick nasal discharge that may be yellow or green
- Postnasal drip, or mucus running down the back of the throat
- Reduced sense of smell
- Headache
- Pressure or pain in the upper teeth or jaw
- Sore throat from drainage
- Cough that is often worse at night
- Bad breath
- Fatigue
- Low-grade fever
One detail that surprises many people: the color of nasal mucus is not a reliable way to tell a viral infection from a bacterial one. Yellow or green discharge can happen with either. Color alone does not prove you need an antibiotic.
How Do These Symptoms Differ From A Regular Cold?
A cold and a sinus infection overlap heavily, which is why the two are so often confused. Both cause a runny nose, congestion, and a cough. The difference usually comes down to timing and how the symptoms behave.
A typical cold peaks within a few days and then gradually improves over about a week to ten days. A sinus infection tends to drag on longer or follows a distinct pattern. Two patterns point more toward sinusitis:
- Symptoms that last more than 10 days without getting better
- Symptoms that seemed to improve and then got worse again — a “double worsening”
Facial pressure and pain are also more prominent with sinusitis than with a plain cold. If your cheeks or forehead ache and the congestion will not clear, that leans toward sinus involvement rather than an ordinary cold.
How Long Do Sinus Infection Symptoms Last?
Most cases of acute sinusitis in adults improve on their own. Viral sinusitis typically follows the same course as a cold and starts to ease within about 10 days. Bacterial sinusitis may last longer, and some cases persist for weeks.
Doctors classify sinusitis by how long it lasts:
- Acute — symptoms lasting less than about 4 weeks
- Subacute — lasting roughly 4 to 12 weeks
- Chronic — lasting 12 weeks or longer, often with ongoing inflammation
Chronic sinusitis is a different situation. It is often driven by persistent inflammation rather than an active infection, and it can involve nasal polyps, allergies, or structural issues in the nasal passages. The symptoms are similar but more stubborn — long-standing congestion, reduced smell, and facial pressure that comes and goes.
When Is Facial Pain Not a Sinus Infection?
Facial pain and pressure do not always mean the sinuses are the problem. Several other conditions produce similar symptoms, and this is where people sometimes treat the wrong thing for weeks.
Migraines and tension headaches can cause pain in the forehead and around the eyes. Temporomandibular joint (TMJ) disorders can cause pain in the jaw, cheek, and ear that mimics sinus pressure. Dental infections in the upper teeth can also refer pain into the cheek and sinus area. In some cases, the pain is genuinely coming from a tooth, not a sinus.
This overlap matters because the treatments are different. If facial pain comes with a throbbing headache, light sensitivity, or nausea, a migraine may be the cause. If it comes with jaw clicking or pain when chewing, a TMJ problem may be involved. A clinician can usually sort this out with a physical exam and, when needed, imaging.
How Do Doctors Tell Viral and Bacterial Sinus Infections Apart?
In most cases, doctors do not need a test. The diagnosis is made from the history and a physical exam. The pattern of symptoms over time is the single most useful clue.
Signs that lean toward a bacterial infection include symptoms lasting more than 10 days without improving, a double worsening pattern, or severe symptoms with a fever above 102°F (about 39°C) along with facial pain that lasts several days. These are general clinical patterns, not a checklist that guarantees a bacterial cause.
Imaging such as a CT scan is not routinely needed for uncomplicated acute sinusitis. It is more often used when symptoms are chronic, when surgery is being considered, or when complications are suspected. Routine imaging for a simple sinus infection is generally not recommended.
What Symptoms Suggest a More Serious Problem?
Most sinus infections are uncomfortable but not dangerous. A small number of cases spread beyond the sinuses or involve the eye or brain, and these need urgent medical attention. Watch for warning signs that go beyond the usual congestion and pressure.
- Swelling or redness around the eye
- Vision changes, double vision, or difficulty moving an eye
- Severe headache that is sudden or unusually intense
- Confusion, stiff neck, or a severe headache with fever
- High fever that will not come down
- Symptoms that keep getting worse instead of better
These signs are uncommon, but they are the reason a sinus infection that seems to be spreading — especially near the eyes or with neurological symptoms — should be evaluated right away. The sinuses sit close to the eye sockets and the brain, so an infection that breaches those boundaries is a medical emergency.
What Helps With Sinus Symptoms?
For typical viral sinusitis, the goal is managing symptoms while the body clears the infection. Several measures are widely used and supported by general clinical practice.
- Saline nasal rinses or sprays to loosen mucus and clear the nose
- Drinking enough fluids to keep mucus thinner
- Steam or a warm compress over the face for comfort
- Rest
- Over-the-counter pain relievers for facial pain and headache, used as directed
- Decongestant nasal sprays for short-term use only — using them more than a few days in a row can cause rebound congestion
Antibiotics are not helpful for viral sinusitis, and most acute cases are viral. Even when bacteria are involved, many cases improve without antibiotics. When antibiotics are prescribed, it is usually for cases that fit a bacterial pattern or that are not improving. This is a decision a clinician makes based on the individual case.
Anyone with a chronic condition, a weakened immune system, or symptoms that concern them should talk with a healthcare provider rather than self-treating for an extended period.
Can You Prevent Sinus Infections?
There is no guaranteed way to prevent sinus infections, but a few habits may lower the odds. Handwashing reduces the spread of the viruses that often set the stage for sinusitis. Staying hydrated and avoiding cigarette smoke — including secondhand smoke — helps keep the nasal passages functioning normally.
For people with allergies, keeping those under control may reduce sinus symptoms, since allergic inflammation can block sinus drainage. Using a humidifier in dry environments may also help keep nasal tissues from drying out. None of these steps is a sure prevention method, but they support the natural clearing of the sinuses.
Frequently Asked Questions
What are the first signs of a sinus infection?
The earliest signs are usually nasal congestion, a runny nose, and pressure or pain in the face. Many people first notice it as a cold that seems to settle into the cheeks or forehead.
How can I tell if a sinus infection is bacterial or viral?
Timing is the main clue — symptoms lasting more than 10 days without improving, or improving and then worsening again, lean toward a bacterial cause. Mucus color alone cannot tell the two apart.
Do sinus infections go away on their own?
Most acute sinus infections in adults improve without antibiotics, often within about 10 days for viral cases. Bacterial cases may take longer, and chronic sinusitis can persist for 12 weeks or more.
When should I see a doctor for sinus symptoms?
See a doctor if symptoms last more than 10 days, keep getting worse, or come with a high fever. Get urgent care for swelling or redness around the eye, vision changes, confusion, or a stiff neck.
