‘Not Every Blocked Nose Is Sinusitis’: An ENT Doctor on Surviving Delhi’s Smog

You wake up and your nose is the first thing to tell you what the air is like. One side is blocked, then the other. There is a dull pressure behind your cheeks, your eyes itch, and the sky outside is the colour of dishwater. You open the AQI app and it says "severe".

Then the questions begin. Is this my sinusitis flaring up? An allergy? Or is it just the smog? Should I reach for that decongestant spray in the drawer? Do I need a doctor, or will this pass when the air clears?

If you live in Delhi NCR with chronic sinusitis or allergic rhinitis, you may know this morning well. Your nose was inflamed long before the first particle of smog arrived, and now you're left guessing, often with whatever is nearest to hand.

Dr M. Shantanu, an ENT specialist in Delhi, says that guesswork is where people go wrong. "Not every blocked nose is sinusitis," he says, and treating it as if it were can backfire.

Here are his answers to the questions people ask most on bad air days, as a field guide for when the sky turns grey. It does not replace a consultation with your own doctor.

Why smog hits sinus and allergy patients harder

Why does a high AQI make a blocked nose worse?

“Think of the nose as a security checkpoint. Mucus and tiny hair-like structures called cilia catch dust, allergens, and microorganisms, while the sinuses rely on that same system to drain,” he explains.

When fine particles slip in, they irritate the lining and set off inflammation. The swelling narrows the small passages linking the sinuses to the nose. Drainage slows, and an old problem feels brand new.

Dr Shantanu points to research linking particulate exposure with chronic rhinosinusitis and with greater severity.

If your congestion, sneezing, facial pressure, postnasal drip, headaches or dulled sense of smell keep flaring when the air is bad, he says, take it as a cue to identify your triggers.

Which pollutants are the troublemakers?

PM2.5 and PM10, particles measuring 2.5 and 10 micrometres or less, top his list. They arrive via vehicle exhaust, construction dust, industrial emissions and smoke.

Traffic-related nitrogen dioxide, a gas produced mainly by burning fuel, adds to the irritation.

“If you live or work near a building site, expect more sneezing and a runnier nose, especially if you have allergies,” he says.

Is it sinusitis, allergy, or just pollution irritation?

The three overlap, so Dr Shantanu reads the pattern.

• Pollution irritation burns, blocks, and makes you sneeze during or after exposure, usually without fever.

• Allergic rhinitis brings sneezing, an itchy nose, watery eyes and a runny nose after contact with pollen, dust mites or pet dander.

• Sinusitis means congestion, facial pressure, reduced smell and nasal discharge, sometimes with fever. Chronic rhinosinusitis generally means symptoms lasting at least 12 weeks.

Pollution and allergy can also feed each other, so your symptoms may refuse to sit in one box.

Can a smoggy day give me a sinus infection?

Not automatically, he says. “Pollution can make symptoms harder to control in people who already have a nasal or sinus condition.”

Viral infections, especially colds, are the most common cause of acute sinus infections. Mucus colour alone cannot confirm a bacterial infection.

Your cause, the duration of symptoms, and a clinical examination should decide treatment, because not every blocked nose needs antibiotics.

What does it do to daily life?

Persistent congestion, sleep broken by difficulty breathing through the nose, a foggy head, repeated flare-ups and allergies that are harder to manage.

Dr Shantanu adds that not everyone who breathes dirty air develops chronic sinusitis. Genetics, allergies, nasal anatomy, infections, and smoking all shape individual risk.

His survival guide for a high-AQI day

Where do I start?

Check the AQI before you plan anything outdoors. When it is poor, cut both the length and the intensity of outdoor exercise, especially near busy roads and construction sites.

Keep a note of whether your symptoms worsen on high-pollution days. That record helps an ENT specialist pin down your triggers.

Reduce smoke and chemical fumes at home too, and follow workplace safety measures if your job is dusty.

Does a mask really help?

A well-fitting N95 worn outdoors can cut inhalation of many airborne particles.

It is not a force field, though. It does not remove every harmful gas, so he treats it as one layer of protection and not the whole answer.

Ordinary cloth or surgical masks do far less against fine particles.

How do I keep my home air cleaner?

Keep windows and doors shut when the air outside is bad, and run a correctly sized HEPA purifier if you have one.

Skip cigarettes, incense, and other indoor smoke.

Open up the house only when the air outside is cleaner than the air inside.

How do I rinse my nose safely?

Saline sprays or rinses clear mucus and irritants, so they suit the end of a day spent outside.

The water is what makes it safe: distilled, sterile, or boiled and cooled. Never untreated tap water. Clean the device as its instructions say.

Can I reach for a decongestant spray?

Dr Shantanu advises against self-medicating with them, because some cause rebound congestion when used longer than recommended.

If symptoms are frequent, get them assessed instead of treating them again and again with over-the-counter medicines.

Do fluids and sleep help?

They support general wellbeing, and he recommends both. But they do not prevent pollution-related sinus inflammation on their own, so they belong beside the steps above, not instead of them.

The goal of the whole routine is to reduce irritation and keep symptoms manageable, not to promise they will never appear.

And home remedies?

Warm compresses, rest, and saline rinses can ease a viral infection but cannot reliably clear a bacterial one. If symptoms continue, see a doctor.

When to see an ENT specialist

How do I know it has gone beyond a bad air day?

Occasional sneezing often settles once you leave the trigger behind. Persistent or recurring symptoms deserve attention.

Book a consultation if you have:

• congestion or facial pressure that will not improve

• repeated episodes of suspected sinusitis

• a persistent loss or reduction of smell

• blockage mainly on one side

• symptoms that disturb sleep or daily activities

• persistent or recurrent headache or ear heaviness

What will the specialist do?

An ENT specialist can tell pollution irritation apart from allergic rhinitis, recurrent sinusitis, nasal polyps or structural problems like a deviated septum.

That can mean reviewing your symptoms, exposure history and past treatments, examining your nasal passages, identifying allergy triggers, and advising on tests or imaging when clinically indicated.

Treatment follows the cause, from saline irrigation to nasal medication or allergy management. Antibiotics are not routine for every episode, and surgery is for selected cases only.

Which symptoms are urgent?

Swelling or redness around the eyes, vision changes, a severe or unusual headache, confusion, or any rapidly worsening symptoms. Go to a doctor straight away.

The one-breath version

Check the AQI before you step out. Wear a snug N95 if you must. Keep indoor air clean. Rinse with safe water. Note whether your symptoms follow the smog.

“None of this guarantees your sinuses will stay quiet. But if symptoms linger, recur or worsen, take that record to an ENT specialist. But most importantly, know that help is always available and self-medication is not a solution,” Dr Shantanu says.