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Post-Nasal Drip: The Constant Trickle That's Wearing You Down

If you're clearing your throat all day, waking up coughing, or feeling like something's always sitting at the back of your throat — post-nasal drip has a cause, and it can be treated
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What is post-nasal drip?

Your nasal and sinus lining produces about a liter of mucus a day — and normally you don't notice it, because it moves silently down the back of your throat and you swallow it. Post-nasal drip is what you feel when either (a) too much mucus is being produced, (b) the mucus is too thick to move quietly, or (c) your throat has become abnormally sensitive to the mucus that's always been there.

Imagine a small stream running under a bridge. Normally you don't notice it. If the stream floods, orturns to sludge, or the bridge becomes hypersensitive — suddenly it's all you can think about. Post-nasal drip is any one of those three going wrong.

What are the symptoms of post-nasal drip?

A constant sensation of mucus at the back of the throat
Frequent throat clearing
Chronic cough — often worse when lying down
Nighttime cough that disrupts sleep
Hoarseness or voice changes
A "wet" or gurgly-sounding voice
Sore throat, especially in the morning
Bad breath
Nausea when swallowing large amounts of drainage

What causes post-nasal drip?

The top causes we see:
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Allergies (allergic rhinitis)

Probably the most common cause of chronic drip.

Chronic sinusitis

Inflamed sinuses produce more mucus and drain it into the throat.

Non-allergic rhinitis

Nasal drainage triggered by irritants, weather, food, or overactive nasal nerves.

Laryngopharyngeal reflux (LPR)

A form of reflux where stomach contents reach the throat, irritating tissue and mimicking (or worsening) post-nasal drip. Many patients diagnosed with "throat drip" are actually experiencing LPR.

Structural issues

Deviated septum, enlarged turbinates, or nasal polyps that impair normal drainage.

Medications

Some blood pressure medications and hormonal changes affect nasal secretions.

Environmental irritants

Smoke, chemical fumes, dry indoor air, air pollution.

Because the causes are so different, the same "post-nasal drip" symptom needs very different treatment depending on what's driving it. That's why one-size-fits-all approaches fail.

Why is one nostril always blocked?

This is one of the most common questions we get. There are a few reasons this happens.

First, everyone has something called the nasal cycle — your body naturally alternates which nostril does more of the breathing throughout the day, swelling the turbinates on one side and shrinking them onthe other. In a healthy nose, you don't notice it. In an obstructed nose, one side is already at its limit, so when the cycle shifts, it feels completely blocked.

Second, and more often, one-sided blockage points to a deviated septum — the cartilage wall between your nostrils is bent, narrowing one side. Roughly 80% of people have some septal deviation; only somecause symptoms.

Third, nasal valve collapse — the sidewall of your nose collapses inward when you inhale — often affects one side more than the other. If pulling your cheek gently outward opens up your breathing, that's a strong clue.

When should I see a specialist about post-nasal drip?

Book an evaluation if:
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Drip has lasted more than 4-6 weeks
Over-the-counter allergy medications haven't fully worked
You have a chronic cough, especially at night
You've been treated for "reflux" without much improvement
You have voice changes or throat irritation
You have blood in your drainage — evaluate promptly

How is post-nasal drip treated?

Because there are multiple possible drivers, treatment has to match the cause. We evaluate, then match.
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1

Tier 1 — Baseline and identifying the driver

Daily saline rinses (large-volume, low-pressure).
Environmental controls if allergies or irritants are contributing.
Hydration (helps thin mucus).
Diagnostic clarity — allergy testing, nasal endoscopy, and, when indicated, evaluation for LPR
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Tier 2 — Directed medical therapy

For allergic drivers: intranasal steroid, non-sedating antihistamine, or antihistamine nasal spray.Immunotherapy for the right candidates.
For non-allergic drivers: intranasal ipratropium or intranasal steroid.
For reflux (LPR): dietary and lifestyle modifications, and acid-suppressing medication whenappropriate.
For sinusitis: treat the underlying sinus disease (see our chronic sinusitis page).
3

Tier 3 — In-office procedural options for chronic rhinitis and drip

ClariFix — a cryotherapy device that gently freezes the posterior nasal nerve, reducing chronicrunny nose and drip.
RhinAer — a temperature-controlled radiofrequency treatment targeting the same nerve, with thesame goal.
NEUROMARK — a newer in-office option in the same category.
Turbinate reduction — for turbinate-driven drip.
4

Tier 4 — Structural fixes

When the drip is driven by a mechanical problem — a deviated septum,obstructive polyps, or nasal valve collapse — the right structural treatment often resolves the drip.

The Exhale approach

Because post-nasal drip has so many possible causes, we take the diagnosis phase seriously. Same-visitnasal endoscopy, allergy history, LPR screening, and structural assessment — because you can't fix a problem you haven't accurately identified. When medical therapy alone isn't enough, we offer modern in-office options (ClariFix, RhinAer, NEUROMARK) that treat the nerve driving chronic drainage —without surgery. Feel better. Be better. Thrive.

What to expect at your first visit

Plan on 60-75 minutes. We'll take a detailed history — when it started, when it's worst, what you've tried, whether you have cough, heartburn, or voice symptoms. A nasal endoscopy lets us see what your sinuses and throat actually look like. Depending on findings, we may recommend allergy testing, an LPR workup, or imaging. You'll leave with a clear diagnosis and a real treatment plan — not just a new spray to try.

SNOT-12 Sinus Assessment

Sinus pressure that won't quit? See how severe it really is.

The SNOT-12 (Sino-Nasal Outcome Test) is a validated 12-item questionnaire that measures how much your sinus problems affect both your body and your daily life. You'll rate symptoms like blockage, post-nasal drip, facial pressure, reduced smell, and sleep disruption on a 0-to-5 scale, producing a total from 0 to 60. Higher scores mean greater symptom burden. Your physician uses the result to gauge severity, decide whether imaging or in-office treatment makes sense, and measure improvement afterward.

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FAQ

How long is post-nasal drip supposed to last?

A few days with a cold or acute allergy flare is normal. Drip lasting more than 4-6 weeks is chronic and should be evaluated to identify the driver.

Can post-nasal drip cause a chronic cough?

Yes — chronic post-nasal drip is one of the most common causes of chronic cough, often called "upper airway cough syndrome." Treating the drip usually resolves the cough.

Is post-nasal drip caused by dairy?

 The evidence is limited. Some individuals report that dairy thickens their mucus perception, though controlled studies have not confirmed dairy as a cause of increased mucus production. If you notice a pattern, an elimination trial is reasonable — but dairy is rarely the whole answer.

What is ClariFix?

ClariFix is an in-office cryotherapy device that briefly freezes the posterior nasal nerve, reducing chronic runny nose and post-nasal drip in appropriate patients. It uses local anesthesia and most patients return to normal activity within a day

How do I know if my "post-nasal drip" is really reflux?

Symptoms of LPR often overlap with postnasal drip — throat clearing, cough, hoarseness — but LPR frequently comes without classic heartburn. In-office laryngoscopy can look for signs of reflux irritation on the throat and voice box. Many patients diagnosed with "chronic drip" for years are actually dealing with LPR.

Will allergy shots help my post-nasal drip?

If allergies are the primary driver, allergy immunotherapy can meaningfully reduce chronic drip over time by lowering the underlying immune response. It's not a fit for every patient — we can evaluate whether it's right for you.