Sinusitis typically announces itself with a combination of nasal congestion, facial pressure or pain, thick nasal discharge, and a reduced sense of smell. If you’ve had at least two of those four symptoms for more than 10 days, or your symptoms got better and then suddenly worsened around day five to seven, there’s a good chance you’re dealing with a sinus infection rather than a ordinary cold.
The Core Symptoms
Four symptoms define sinusitis: facial pain or pressure, nasal congestion or blockage, nasal drainage (often thick), and a decreased or lost sense of smell. You don’t need all four. Having at least two that persist beyond the typical cold timeline points toward a sinus infection.
Beyond these, you may notice post-nasal drip (mucus draining down the back of your throat), a cough that worsens at night, bad breath, a sore throat, or fatigue. Fever is possible but not guaranteed, and headaches often accompany the facial pressure, especially in older children and adults.
Where Your Pain Points to the Problem
The location of your facial pain can tell you which sinuses are inflamed. Pain in your cheekbones or upper teeth suggests your maxillary sinuses, the large ones behind your cheeks. Forehead pain points to the frontal sinuses. Pain at the bridge of your nose involves the ethmoid sinuses, while aching behind your eyes or in your ears suggests the sphenoid sinuses deeper in your skull.
A simple check: press gently on the areas just above the inner corners of your eyes (near the bridge of your nose) or on your cheekbones below your eyes. If that pressure produces noticeable tenderness, your sinuses are likely inflamed. Bending forward or straining can also intensify the pain, which is a hallmark of sinusitis that you won’t typically get with a tension headache or migraine.
Cold vs. Sinusitis: The Timeline Matters
Most colds improve within seven to 10 days. If your symptoms push past that 10-day mark without getting better, the infection may have shifted from viral to bacterial. Another telltale pattern is “double sickening,” where you start feeling better after a few days and then take a clear turn for the worse around day five to seven. That rebound is one of the strongest indicators of a bacterial sinus infection.
Bacterial sinusitis is also more likely when you have severe, one-sided facial pain, thick discolored discharge primarily from one nostril, or a fever above 100.4°F. But the timeline remains the single most reliable clue you can track at home.
Is It Allergies or a Sinus Infection?
Allergies and sinusitis share congestion and a runny nose, which makes them easy to confuse. The simplest way to tell them apart: itching. Allergies make things itch. Your eyes itch, the back of your throat feels scratchy, and sneezing comes in rapid bursts. Sinusitis doesn’t feel itchy. It feels heavy, painful, and pressurized.
Discharge color offers another hint, though it’s less reliable than most people think. Yellow or green mucus is more common with sinusitis, but the Mayo Clinic has noted that both viral and bacterial infections can change mucus color. Green mucus alone is not proof of a bacterial infection and is not a reason to take antibiotics. Viruses cause the vast majority of upper respiratory infections, and antibiotics do nothing against them regardless of mucus color.
Allergies also tend to follow patterns. They flare during specific seasons or after exposure to triggers like pet dander. Sinusitis typically follows a cold or develops after prolonged congestion.
Sinusitis in Children
Kids display sinusitis differently than adults. Children under five rarely complain of headaches with a sinus infection. Instead, look for a runny nose lasting longer than seven to 10 days (the discharge may be thick and green, yellow, or even clear), a nighttime cough, occasional daytime cough, and swelling around the eyes. Older children develop symptoms closer to the adult pattern, including headaches, facial discomfort, bad breath, sore throat, and eye swelling that’s often worse in the morning.
Because young children can’t easily describe facial pressure, a cold that simply won’t quit is often the biggest clue.
When Sinusitis Becomes Chronic
If your symptoms have dragged on for 12 weeks or more, you may have chronic sinusitis. The diagnostic threshold is at least two of the four cardinal symptoms (facial pain or pressure, reduced smell, nasal drainage, nasal obstruction) persisting for at least 12 consecutive weeks. Chronic sinusitis feels less like an acute illness and more like a constant low-grade version: persistent stuffiness, diminished sense of smell, and a general heaviness in your face that never fully clears.
Chronic sinusitis usually requires confirmation beyond symptoms alone. A healthcare provider will typically look inside the nose with a small camera (nasal endoscopy) or order a CT scan to see the extent of inflammation and rule out structural issues like polyps or a deviated septum. These tests help distinguish chronic sinusitis from other conditions that mimic it, like persistent allergies or migraines.
What Warrants Urgent Attention
Most sinusitis resolves on its own or with straightforward treatment, but in rare cases the infection can spread to nearby structures. Seek immediate care if you develop swelling or redness around your eyes, double vision or other vision changes, a high fever, a stiff neck, or confusion. These symptoms suggest the infection may be affecting the eye socket or the membranes around the brain, both of which require prompt treatment.
A Quick Self-Check
If you’re trying to figure out whether you have sinusitis right now, run through this list:
- Duration: Have your symptoms lasted more than 10 days, or did they improve and then worsen around day five to seven?
- Facial pressure: Do you feel pain or tenderness in your cheeks, forehead, or around your eyes, especially when you bend forward?
- Congestion: Is your nose blocked enough to affect your breathing or your sense of smell?
- Discharge: Is thick mucus draining from your nose or down the back of your throat?
Two or more of those, especially combined with a timeline that’s outlasted a normal cold, makes sinusitis the likely explanation. If your symptoms are mild and manageable, supportive care like saline rinses, steam, and staying hydrated often does the job. If they’re severe, worsening, or have crossed the 10-day mark without improvement, that’s when a medical evaluation can determine whether you need more targeted treatment.