A sinus infection is likely when you’ve had cloudy or colored nasal discharge along with a stuffy nose, facial pressure, or both for more than 10 days without improvement. Most colds clear up within 7 to 10 days, so symptoms that plateau or worsen past that point are the clearest signal that a simple cold has turned into a bacterial sinus infection. Here’s how to tell what you’re dealing with.
The Three Patterns That Point to a Sinus Infection
Not every stuffy nose is a sinus infection. Doctors look for one of three specific patterns before making the call:
- Symptoms that won’t budge. You’ve had nasal congestion, facial pressure, and discolored discharge for at least 10 days with no sign of improvement. A regular cold would be trending better by now.
- Double sickening. You started feeling better after a cold, then got worse again between days 5 and 10. This rebound pattern is one of the strongest indicators of a bacterial infection.
- Severe onset. You develop a high fever (102°F or higher) along with thick, discolored nasal discharge and facial pain that hit hard right from the start and last at least three or four days straight.
If your symptoms don’t match any of these patterns, you most likely have a viral cold or allergies. That’s good news, because it means your body will handle it on its own.
What Sinus Pain Actually Feels Like
The face has four pairs of sinus cavities, and where you feel pain depends on which ones are inflamed. Infection in the sinuses behind your cheekbones causes aching below your eyes and can even make your upper teeth hurt. When the sinuses above your eyebrows are involved, you’ll feel a headache across your forehead. Infection in the sinuses between your eyes produces a deep, splitting pressure behind the bridge of your nose, sometimes with watery eyes. The sinuses deep behind your nose can cause a vague, hard-to-locate pain that shifts between the front and back of your head.
The pain typically gets worse when you bend forward, and it often intensifies in the morning after mucus has pooled overnight. You can do a quick check at home: using your thumbs, gently press in a circular motion just below your eyebrows (avoiding the eye socket) and then below your cheekbones on either side of your nose. Tenderness or a sharp increase in pressure at those spots suggests your sinuses are inflamed.
Mucus Color Is Not the Whole Story
Green or yellow mucus is one of the most commonly cited “signs” of a bacterial infection, but it’s unreliable on its own. Both viral and bacterial infections change the color and thickness of nasal mucus. Your body sends white blood cells to fight any infection, and as those cells break down, they tint the mucus green or yellow regardless of whether the cause is a virus or bacteria. Discolored mucus is part of the diagnostic picture, but it doesn’t seal the diagnosis by itself.
What matters more than color is the combination: discolored discharge plus persistent congestion plus facial pain or pressure, lasting beyond that 10-day threshold or following the double-sickening pattern.
Sinus Infection vs. Migraine
Many people who think they have recurring sinus infections actually have migraines. This isn’t a rare mix-up. Migraines frequently cause nasal congestion, a runny nose, watery eyes, and facial pressure, which makes them feel almost identical to sinus problems. The crossover happens because migraines activate the same nerve pathways that control nasal function.
A few clues can help you sort it out. Sinus infections come with consistently thick, discolored discharge and tend to produce steady pressure that worsens over days. Migraines are more likely to involve throbbing or pulsing pain, sensitivity to light or sound, nausea, and clear or thin nasal drainage. If you keep getting “sinus headaches” several times a year but never have a true infection confirmed, migraines are worth considering.
When It Becomes Chronic
An acute sinus infection lasts up to four weeks. If your symptoms persist beyond 12 weeks, the diagnosis shifts to chronic sinusitis. Chronic sinusitis doesn’t necessarily mean a worse infection. It often involves ongoing inflammation driven by allergies, nasal polyps, or structural issues rather than active bacteria. The symptoms are similar (congestion, facial pressure, reduced sense of smell, postnasal drip) but tend to be less intense and more grinding than the acute version. Treatment focuses on reducing inflammation over the long term rather than fighting a single infection.
Symptoms That Need Immediate Attention
Sinus infections rarely become dangerous, but in uncommon cases the infection can spread to nearby structures like the eye socket or the lining of the brain. Get emergency care if you develop any of the following alongside sinus symptoms:
- High fever over 103°F (40°C)
- Swelling or pain around your eyes, especially with vision changes
- Severe headache with a stiff neck
- Confusion or changes in mental alertness
- Seizures
These signs suggest the infection may be spreading beyond the sinuses and needs treatment right away.
What to Expect if You Do Have One
Most sinus infections, even bacterial ones, resolve without antibiotics within two to three weeks. Treatment during that window focuses on managing symptoms: saline nasal rinses to flush out mucus, over-the-counter pain relief for facial pressure, and decongestant sprays used sparingly (no more than three days, or they can make congestion worse). Warm compresses over the painful areas and staying well hydrated also help thin mucus so it drains more easily.
Antibiotics come into play when symptoms are severe from the start, when they persist beyond 10 days with no improvement, or when the double-sickening pattern is clear. Even then, the course is typically short. If you’ve had symptoms for a week and they’re gradually improving, that’s your immune system doing its job, and waiting it out is usually the right call.