A sinus infection feels like intense pressure building behind your face, as if someone is pressing hard on your cheekbones, forehead, and the bridge of your nose. That pressure often comes with a deep, throbbing ache that gets noticeably worse when you bend over, along with thick nasal congestion that makes it hard to breathe through your nose. Most sinus infections start as a cold that simply refuses to get better, and the combination of facial pain, fatigue, and heavy mucus drainage is what sets the experience apart from ordinary congestion.
Facial Pressure and Pain
The hallmark sensation is pressure and tenderness concentrated around your eyes, cheeks, nose, and forehead. It can feel dull and constant, or it can shift into throbbing face pain that pulses with your heartbeat. Many people describe it as a heavy, full feeling, like their face is swollen from the inside. The pain typically intensifies when you lean forward, lie down, or move your head quickly, because those position changes shift fluid inside the inflamed sinuses.
Where you feel the pressure depends on which sinuses are affected. Inflammation in the sinuses behind your cheekbones creates a deep ache across the middle of your face. When the frontal sinuses above your eyebrows are involved, you’ll feel a band of pressure across your forehead that can mimic a tension headache. Some people also feel pain between and behind their eyes, which can make it hard to concentrate or look at screens for long.
Upper Tooth Pain
One of the more confusing symptoms is a toothache in your upper back teeth. Your largest sinuses sit directly above the roots of those teeth, and the roots sometimes extend right into the sinus cavity. When those sinuses swell, the inflammation presses on nearby nerve endings and creates pain that genuinely feels dental. If several upper teeth on one or both sides ache at the same time and you also have nasal congestion, the sinuses are the likely culprit rather than a cavity.
Nasal Congestion and Discharge
Your nose will feel completely blocked, sometimes on one side, sometimes both. Breathing through your nose may be nearly impossible, and the congestion creates a muffled quality to your voice. The nasal discharge itself tends to be thick and discolored, often yellow or green, though color alone doesn’t reliably indicate whether the infection is viral or bacterial. That greenish tint comes from immune cells and the enzymes they produce as your body fights the infection, not necessarily from bacteria.
Much of that thick mucus drains down the back of your throat rather than out your nose. This post-nasal drip leaves a bad taste in your mouth, triggers a persistent sore throat, and causes a cough that tends to be worse at night when you’re lying down. The drainage can also cause bad breath that brushing your teeth won’t fix.
Fatigue and Whole-Body Effects
Sinus infections are surprisingly exhausting. The constant pressure, disrupted sleep from congestion and coughing, and your immune system working overtime all combine to produce a heavy, dragging fatigue. You may also notice a reduced or completely absent sense of smell, and because smell and taste are closely linked, food can taste bland or off. A low-grade fever is common, though high fevers are less typical with a straightforward sinus infection. Some people also report a general achiness, though body aches are more associated with the initial cold virus than the sinus infection itself.
How It Differs From a Cold or Allergies
A regular cold usually improves within seven to ten days. Allergies cause sneezing, watery or itchy eyes, and a thin, clear runny nose, and they respond to antihistamines. A sinus infection is distinct: you get that swollen, painful feeling around your forehead, eyes, and cheeks, thick colored mucus, a bad-tasting post-nasal drip, bad breath, and persistent tiredness. If your cold seemed to be getting better and then suddenly worsened again, or if symptoms have dragged on past ten days without improvement, a sinus infection is the most likely explanation.
The itchiness that defines allergies is notably absent with a sinus infection. And while a cold can make your face feel stuffy, it rarely produces the localized, pressing pain that makes you wince when you touch your cheekbones or lean forward.
Viral vs. Bacterial: What the Progression Feels Like
Most sinus infections are viral and will start improving on their own after five to seven days. A bacterial sinus infection, by contrast, often persists for seven to ten days or longer and may actually feel worse after the first week instead of better. That worsening pattern, sometimes called “double sickening,” is one of the more reliable ways to distinguish the two. You feel like you’re turning the corner, then the pressure, discharge, and fatigue come back heavier than before.
Symptoms like green mucus, headache, and even fever are not reliable indicators on their own. They occur with viral infections too. Even a doctor can’t tell whether your infection is viral or bacterial based on symptoms or a physical exam alone, so the timeline and trajectory of how you feel matter more than any single symptom.
Acute, Subacute, and Chronic Timelines
An acute sinus infection lasts less than four weeks and generally clears up with appropriate care. Subacute sinusitis is the frustrating middle ground: symptoms linger for four to eight weeks and don’t respond to initial treatment. Chronic sinusitis means symptoms have persisted for twelve weeks or longer, often with less intense but constant pressure, congestion, reduced smell, fatigue, and bad breath. Chronic sinusitis feels less like being acutely sick and more like never quite being well, a low-level version of the same symptoms that simply won’t resolve.
How It Feels in Children
Children experience sinus infections somewhat differently. Kids under five rarely complain of headaches, so parents should watch for a runny nose that lasts longer than seven to ten days, thick green or yellow discharge, nighttime coughing, and swelling around the eyes. Older children are more likely to describe the facial discomfort, headache, and sore throat that adults recognize. Eye swelling in children tends to be worse in the morning and can look alarming, with puffiness around the inner corners of the eyes after a night of lying flat.
A cold that simply won’t quit is the most common presentation in kids. If your child’s runny nose has lasted well past ten days, especially with thick discolored mucus, a sinus infection is the likely reason.