You can’t definitively diagnose a sinus infection at home, but you can check for the key signs that doctors themselves use to distinguish a sinus infection from a regular cold. The combination of specific symptoms, how long they’ve lasted, and a simple physical check of your face gives you a reliable picture of what’s going on before you decide whether to seek care.
The Symptom Checklist Doctors Use
Clinicians sort sinus infection symptoms into two categories: major and minor. You can run through these same lists at home. The major symptoms are thick, discolored nasal discharge, nasal congestion, facial pain or pressure, reduced sense of smell, and a feeling of mucus draining down the back of your throat. Having two or more of these major symptoms strongly suggests sinusitis rather than a simple cold.
Minor symptoms fill in the picture: headache, low-grade fever, bad breath, fatigue, upper tooth pain, cough, and ear pain or a feeling of fullness in the ears. On their own, these minor symptoms don’t point to a sinus infection. But when they appear alongside the major ones, they add weight to the possibility.
Grab a pen and check off which symptoms you have. Two or more major symptoms, or one major symptom paired with two or more minor ones, is the general threshold that raises suspicion of a true sinus infection.
The 10-Day Rule
This is the single most useful tool for testing yourself at home. A typical cold follows a predictable arc: symptoms peak around days three to five, then gradually improve. A bacterial sinus infection breaks that pattern. If your symptoms have lasted longer than 10 days without any improvement, that timeline alone suggests a bacterial infection has taken hold rather than a virus simply running its course.
There’s a second pattern to watch for, sometimes called “double worsening.” You start feeling better after a few days of cold symptoms, then around day five or six, everything gets worse again. The congestion returns heavier, the facial pressure intensifies, and the discharge thickens or turns yellow-green. This rebound is another hallmark of bacterial sinusitis setting in after an initial viral illness.
Keep a simple log of your symptoms day by day. Note whether they’re improving, stable, or worsening. That timeline will be the most useful thing you can share with a doctor if you end up needing one.
How to Check Your Sinuses by Touch
You can physically examine your own sinuses using the same basic technique clinicians use: direct percussion and palpation. The goal is to check whether pressing on specific areas of your face produces pain or a deep ache, which indicates inflamed, swollen sinus cavities underneath.
Start with your cheekbones. Press firmly with your index and middle fingers just below each eye, over the fleshy part of the cheek. This is where your maxillary sinuses sit. Then move to the area between and just above your eyebrows, pressing along the brow ridge. These are your frontal sinuses. You can also tap gently on these areas with the tips of your flexed fingers, striking the skin at a 90-degree angle. A sharp tenderness or a deep, pressure-like pain when you press or tap suggests inflammation in the underlying sinus cavity.
Compare both sides. Sinus infections often affect one side more than the other, so noticeably worse pain on one side is a useful clue. Pain that intensifies when you bend forward, like when tying your shoes, is another classic sign of fluid-filled sinuses responding to gravity.
Checking Your Nasal Discharge
The color and thickness of what comes out of your nose tells you something, though not as much as people think. Clear, thin mucus is typical of allergies or the early stages of a cold. Thick, yellow or green discharge that persists for more than a week is more consistent with a bacterial sinus infection. But color alone isn’t reliable. Your immune system produces greenish mucus whenever it’s fighting hard, even during a normal viral cold.
What matters more than color is the combination of thick discharge with other symptoms, particularly facial pressure, reduced smell, and the timeline exceeding 10 days. If you’re blowing out thick, discolored mucus but you’re on day four and otherwise improving, you likely have a cold doing its normal thing.
The Upper Tooth Pain Test
Your upper back teeth sit directly beneath your maxillary sinuses, separated by a thin layer of bone. When those sinuses are infected and swollen, the pressure can radiate into the roots of your upper molars and premolars. If you’re experiencing an ache across several upper back teeth on one or both sides, and the pain coincides with nasal congestion and facial pressure, it’s likely referred pain from your sinuses rather than a dental problem.
A key distinction: sinus-related tooth pain tends to affect multiple teeth in a general area and feels like a dull, pressure-like ache. A cavity or dental abscess usually produces sharp, localized pain in a single tooth that worsens with hot or cold food. If the tooth pain appeared at the same time as your cold symptoms and gets worse when you bend forward, sinuses are the more likely culprit.
What Your Results Mean
If you’ve checked all these boxes (symptoms lasting beyond 10 days, facial tenderness on palpation, thick discolored discharge, reduced smell, and possibly upper tooth pain) you’re dealing with something that looks a lot like a bacterial sinus infection. Most acute sinus infections do resolve on their own within two to three weeks with rest, hydration, and symptom management like saline rinses, steam inhalation, and over-the-counter pain relievers.
The signals that suggest you need professional evaluation: a fever above 102°F, severe facial pain that doesn’t respond to pain relievers, symptoms that worsen after initially improving, or symptoms stretching beyond three to four weeks. Swelling or redness around the eyes is a red flag that needs prompt attention, as it can indicate the infection is spreading beyond the sinus cavities.
Home testing won’t replace imaging or a nasal endoscopy for complicated cases. But for the straightforward question of “is this still a cold or has it become a sinus infection,” tracking your symptoms over time and checking your face for tenderness gives you a surprisingly accurate answer.