Sinusitis: Symptoms You Shouldn't Ignore

There's one line that defines almost everything on this topic: when sinusitis symptoms last more than 12 weeks, we're no longer talking about a passing episode, we're talking about an established problem. And most people who come in for a consultation crossed that line years ago without realizing it, because sinusitis symptoms are rarely dramatic. They're discomforts people put up with and explain away with the weather, work, or the city's pollution.

What we see every day is people who have stopped noticing what's happening to them. They sleep poorly and think they sleep normally. They breathe through their mouth and don't even notice. They get sick every two months and chalk it up to bad luck. When something keeps repeating, it stops being a coincidence.

Here we tell you how to recognize sinusitis, what causes it, what it looks like in children, what it gets confused with, what happens if it isn't treated, and what to do to truly resolve it.

Hi, I'm Dr. Carlos Yáñez, founder of Sinus Center, a center specialized in nose surgery and rhinoplasty that helps children and adults get back something that sounds basic and changes everything: breathing well. In more than three decades dedicated to the nose, the sinuses, and the Eustachian tube, the pattern we see most in our practice is this: patients who have lived with normalized symptoms for years and no accurate diagnosis. That's why at Sinus Center we don't chase the symptom, we look for the cause, because when the diagnosis isn't accurate the problem persists.

How can you tell if someone has sinusitis?

Sinusitis is inflammation of the lining of the paranasal sinuses, the air cavities around the nose and eyes. When that lining becomes inflamed, mucus stops flowing and the sinuses don't get air. No single symptom confirms the diagnosis: what points to it is the combination, how long you've had it, and how often it comes back.

This is where we want to be precise. Two people with the same symptoms can have different causes, and the treatment depends on that. One has a reactive lining because of allergies; the other has a deviated septum that narrows the airway. If the second is treated like the first, they improve for a few weeks and end up back where they started. An accurate diagnosis changes the outcome.

Sinusitis symptoms in adults: the ones we see most in our practice

There are four main symptoms:

Nasal congestion and obstruction, the feeling that air isn't passing well through one or both sides
Thick discharge or drainage down the throat, which many describe as constant throat clearing
Facial pressure or pain in the forehead, cheekbones, or around the eyes
Reduced sense of smell, which fades so gradually that almost nobody mentions it until they're asked

The symptoms almost nobody connects with the nose

There's another group that is rarely reported and that helps us most to understand the full picture. Fatigue that doesn't go away with rest, because breathing poorly at night fragments sleep. Persistent bad breath, from the discharge that runs down the throat. Pain in the upper molars, because the maxillary sinuses sit right above those roots. A cough that gets worse when lying down. And a feeling of a clogged ear, because of the direct connection between the nose and the Eustachian tube.

When someone has been tired and congested for years, we don't see two problems: we see one. That's the connection most often missing from the medical records that reach our office.

Sinusitis without mucus: the case most often overlooked

There's an idea that no mucus means no sinusitis, and that idea delays a huge number of diagnoses. When the sinus outlet is blocked, the discharge doesn't come out: it stays inside, the pressure builds, and the symptoms are facial pressure, a heavy head, a dulled sense of smell, and fatigue, without you seeing anything when you blow your nose. Your nose may even feel dry.

This scenario shows up mainly when the underlying cause is structural. A deviated septum, enlarged turbinates, polyps that grew over the years, or the after-effects of an old nasal fracture that nobody checked again. Not everything is an allergy, and it's worth repeating: sometimes the problem isn't the inflammation, it's the shape. No medication corrects the shape of a nose. Nasal endoscopy and imaging show exactly where the blockage is, and that information decides whether treatment will work or only buy time.

What causes sinusitis?

The most common cause of an acute episode is a viral infection that drags on. A cold inflames the lining, the inflammation closes the sinus outlet, mucus builds up, and the condition sets in. In some cases a bacterial infection is added, and that's when pain and fever become more noticeable. That's the scenario people recognize and the only one many consider.

The group that is almost never investigated thoroughly is the structural one, and it's the one that explains why it keeps coming back for so many people. A deviated septum, enlarged turbinates that swell with every change in temperature, nasal polyps that block drainage, or the after-effects of a nasal fracture from adolescence that healed however it could. Allergies also play a role and often coexist with all of the above: you can have well-controlled allergies and still have sinusitis because your anatomy doesn't allow drainage.

Mexico City's environment and why it brings the problem to the surface

Add to that the environment you live in. The dry air at altitude, Mexico City's pollution, office air conditioning, and frequent flights, where pressure changes on sinuses that aren't ventilating cause intense pain.

These factors rarely cause the problem on their own, but they bring out one that already existed. When someone always gets sick after traveling, it's not a coincidence: it's a nose that works at its limit and only needs one extra demand to break down.

Types of sinusitis: acute, chronic, and recurrent

Classifying sinusitis isn't a technical detail; it's what defines the treatment approach. Find the row that describes your real history, not just your last episode.

Type	Duration of symptoms	What characterizes it	What's usually behind it
Acute sinusitis	Up to 4 weeks	A clear onset after a cold, with congestion, facial pain, and thick discharge	A viral infection that drags on, sometimes with an added bacterial infection
Subacute sinusitis	4 to 12 weeks	The condition improves a little but never fully goes away	Drainage that isn't restored because of persistent inflammation or a narrow space
Chronic sinusitis	More than 12 weeks	Constant congestion, reduced sense of smell, facial pressure, and background fatigue	A structural cause, polyps, or ongoing inflammation of the lining
Recurrent sinusitis	Four or more episodes a year with symptom-free periods	You feel fine between episodes, but it comes back every season	Anatomy that predisposes to it, such as a deviated septum or enlarged turbinates

If you found yourself in the last two rows, here's what matters: chronic and recurrent cases are almost never resolved by repeating the treatment for an acute episode. Each round of antibiotics gives you a few weeks of calm and doesn't touch the reason it keeps coming back. What's needed is to study the anatomy and the drainage and correct whatever prevents the nose from working normally. Putting it off doesn't leave the problem the same; it makes it more complex: sustained inflammation changes the lining, and the sense of smell takes longer to recover.

A word on vocabulary, because it shows up often in imaging reports. Today the correct technical term is rhinosinusitis, since the inflammation almost never stays only in the sinuses and also involves the nose.

What are the symptoms of sinusitis in children?

In children the condition almost never looks like it does in adults, and that's why it gets overlooked. A child doesn't say they feel pressure in their cheekbones or that they've lost their sense of smell. What they do is breathe through their mouth, snore softly, sleep restlessly, wake up tired and irritable, get sick over and over, have trouble concentrating, and do worse at school for no apparent reason.

This is where putting it off costs the most. A child who doesn't breathe well through the nose for years can develop changes in jaw growth and in the bone structure of the face, because breathing directly influences how a developing face is formed. Time is not neutral here. That's why at Sinus Center we insist on evaluating early and accurately: not to operate on everyone, but to know exactly what's happening while there's still room to act.

What gets mistaken for personality or ADHD

A child who sleeps poorly doesn't look sleepy during the day; they look hyper, distracted, and irritable. They have trouble following instructions, get frustrated quickly, and lose track in class. That profile is read as a behavior problem or an attention deficit, and it starts being managed that way without anyone checking whether the child can breathe.

Many times it's not behavior, it's breathing. When a child spends the night with a blocked nasal airway, their sleep is fragmented and they don't reach the deep stages where learning is consolidated and mood is regulated. The next day they function with half their resources. We've seen it many times: the obstruction is resolved, the child sleeps deeply, and within a few weeks the parents report a different child at home. The point isn't to assume it; it's to rule it out with a serious diagnosis before labeling a child.

Signs during sleep: what the night reveals

Night is the best time to observe. Notice whether your child:

Sleeps with their mouth open or snores, even softly
Breathes with effort or pauses while breathing
Moves a lot, changes position constantly, or ends up sideways in bed
Sweats more than normal during the night
Wakes up with a pillow wet with drool and a dry mouth

All of these signs point to the same thing: air isn't flowing the way it should. A child who sleeps ten hours and wakes up tired isn't sleeping well; they're struggling to breathe while they sleep. That sustained effort over years has consequences for physical, cognitive, and behavioral development. Breathing well is the foundation, and in a child it's also the foundation of how they will grow.

What condition is mistaken for sinusitis?

Allergic rhinitis is the number one confusion. It shares congestion, sneezing, and a runny nose, but its discharge is clear and watery, it appears with exposure to an allergen, and it doesn't usually cause facial pain or thick discharge. You can have rhinitis and sinusitis at the same time, and then treating only the allergy leaves half the problem untouched. Migraine is the second: it also causes facial pressure, tearing, and congestion, and many people spend years treating sinusitis when what they actually have are migraine episodes.

The third is true dental pain. Because the maxillary sinuses sit above the upper molars, a dental problem can feel like sinusitis, and sinusitis can feel like a bad tooth. And in children, the most costly confusion is with attention deficit, because it leads to treating behavior when what needs treatment is an airway. Telling all of this apart isn't done by describing symptoms: it's done by examining the inside of the nose and looking at the sinuses on imaging.

What happens if sinusitis isn't treated?

The first thing that happens is the shift from acute to chronic. Inflammation that doesn't resolve keeps the sinuses from getting air, the lining thickens, drainage gets worse, and the condition settles at a low, constant level that becomes your new normal. That's when your sense of smell stops coming and going and becomes a persistent loss, and recovering it takes longer the later it's treated.

The second is the daily cost that nobody adds up. You sleep poorly, wake up tired, perform less, train worse, get sick more often, and get home with no energy for anyone. Living tired is not normal, and it's the baseline state of a great many patients who come to us.

There are also real complications: the sinuses share walls with the eye socket and the base of the skull, and an infection can spread there. It's uncommon, it's serious, and it's one more reason not to let the problem run for years.

What can you do to get rid of sinusitis?

The order matters more than the list of options. First, an accurate diagnosis: a detailed medical history, nasal endoscopy to see inside, and imaging to know the state of each sinus and the real anatomy of your nose. Without that step, any treatment is an educated bet, and bets explain why so many people spend years in the same place.

Second, targeted medical treatment. When the problem is inflammatory or infectious, well-focused medical management, together with nasal rinses, allergy control when needed, and care of your environment, resolves many cases. It's worth saying clearly here: sinusitis treatment isn't one single thing; it depends entirely on what we find, and that's exactly why diagnosis comes first.

Third, surgery when the cause is structural. If what prevents drainage is a deviated septum, enlarged turbinates, or polyps, no medication will change it. In those cases we use minimally invasive procedures and image-guided endoscopic surgery, which allows us to operate with millimeter precision, preserving healthy tissue and restoring the function of the nose. It's one of the techniques we introduced in Mexico, and we use it with a simple rule: we operate when resolving the cause requires it, not before.

How many of these sinusitis symptoms have you stopped noticing because you got used to them?

If while reading this you recognized three or four things you thought were normal in yourself or your child, that's the point of this article. Familiar is not the same as normal. Your body adapts to breathing poorly, sleeping worse, and functioning tired, and that adaptation is exactly what lets the years go by without anyone checking the cause.

What we do is find it. We study your nose and sinuses thoroughly, determine whether the origin is inflammatory, structural, or mixed, and define the sinusitis treatment that fits your case, with minimally invasive procedures and image-guided endoscopic surgery when the structure needs to be corrected. The goal isn't for the symptom to calm down for a while; it's for it to have no reason to come back.

We see patients at Hospital ABC Santa Fe and welcome patients from across the western part of the city, so you can come if you're looking for an ENT specialist in Santa Fe, Mexico City or if it's closer for you from Polanco. We also see many families from the Álvaro Obregón borough, just a few minutes from the hospital.

Book your consultation today.