Sinus symptoms center on four main problems: a stuffy or blocked nose, thick discolored mucus, facial pain or pressure, and a reduced sense of smell. These symptoms can show up together or in varying combinations depending on whether the cause is a viral cold that hasn’t resolved, a bacterial infection, or ongoing allergic inflammation. Understanding what each symptom feels like, and which combinations point to different causes, helps you figure out what you’re actually dealing with.
The Four Core Symptoms
Nasal obstruction is the most common sinus symptom, affecting 81% to 95% of people with sinusitis. Your nose feels blocked on one or both sides, making it hard to breathe normally. This congestion often worsens at night or when lying down.
Facial pressure and pain come next, reported by 70% to 85% of patients. You’ll feel it around your eyes, cheeks, forehead, or the bridge of your nose. The pressure typically gets worse when you bend forward, like tying your shoes or picking something up off the floor. Some people describe it as a deep, dull ache rather than sharp pain.
Thick, discolored nasal discharge affects roughly 51% to 83% of people. This mucus is usually yellow or green and can drain from the front of your nose or slide down the back of your throat (postnasal drip). Postnasal drip often triggers a sore throat or cough, especially at night when mucus pools while you sleep.
A reduced sense of smell rounds out the four core symptoms, present in 61% to 69% of cases. Swollen sinus tissue physically blocks odor molecules from reaching the smell receptors high in your nasal cavity. Food may taste bland during this time since smell and taste are closely linked.
How Sinus Symptoms Differ From a Cold
Colds and sinus infections share a lot of the same symptoms, which is why so many people confuse them. The key differences come down to timing, discharge color, and fever.
A cold typically improves on its own within 7 to 10 days. If you start feeling worse after 10 to 14 days instead of better, that’s usually the point where a cold has turned into a bacterial sinus infection. This “double worsening” pattern is the single most reliable clue. You feel like you’re getting better, then symptoms come back stronger.
Mucus color also helps. Clear discharge is more typical of a cold, while yellow or green discharge points toward a sinus infection. That said, color alone isn’t definitive since viral colds can briefly produce yellowish mucus too. The combination of colored discharge plus prolonged symptoms is more telling than either sign on its own.
Fever is actually more common with colds than with sinus infections. Viruses are more likely to spike your temperature. A sinus infection has to be quite severe to cause a fever, so if you have a high temperature in the first few days of being sick, a cold is the more likely culprit.
Allergies vs. Sinus Infection
Allergic inflammation in the nasal passages can mimic sinusitis closely, but a few symptoms set allergies apart. Itchy, watery eyes are a hallmark of allergies and rarely show up with a bacterial sinus infection. Frequent sneezing and a scratchy feeling in the back of your throat also lean toward an allergic cause.
Sinus infections are more likely to produce facial pain and pressure along with a noticeable loss of smell. The discharge difference matters here too: allergies tend to cause thin, clear, watery mucus, while infections produce thicker yellow or green drainage. Allergies can, however, lead to sinusitis over time. Chronic nasal swelling from untreated allergies blocks the sinus drainage pathways, creating conditions where bacteria thrive.
Sinus Symptoms in Children
Kids don’t always present the way adults do, and younger children in particular have a different symptom profile. Children under five rarely complain of headaches with sinusitis. Instead, the most noticeable signs are a runny nose lasting longer than 7 to 10 days, thick green or yellow discharge (though it can sometimes be clear), and a cough that’s worse at night with occasional episodes during the day. Swelling around the eyes is another sign to watch for in young children.
Because kids can’t always describe facial pressure or a reduced sense of smell, parents often notice behavioral changes like irritability, mouth breathing, or disrupted sleep before recognizing the illness as a sinus problem rather than a lingering cold.
Symptoms That Need Prompt Attention
Most sinus infections resolve with time or straightforward treatment, but in rare cases the infection can spread beyond the sinuses. Swelling or redness around the eye, changes in vision, or eye pain suggest the infection is reaching the tissues surrounding the eye socket. This needs evaluation quickly.
Even less commonly, a sinus infection can spread toward the brain and its surrounding tissues, causing a severe headache paired with confusion. These complications are uncommon but serious. If you develop visual changes, a bulging or red eye, or sudden confusion alongside sinus symptoms, get medical attention the same day rather than waiting it out.