Can dairy actually cause post-nasal drip or is that a myth?

Dairy does not increase mucus production, but its proteins can make secretions feel thicker, which many people interpret as more mucus.

Is constant throat clearing dangerous?

Excessive clearing can inflame vocal cords over time, leading to hoarseness, but it rarely damages the airway itself.

How long should I try saline rinses before deciding they don’t work?

Use them twice daily for at least 7–10 days; benefits build as allergens and thick mucus are flushed out.

Could COVID-19 cause months of post-nasal drip?

Some people experience lingering upper airway inflammation after COVID-19, but most improve within 12 weeks; persistent symptoms warrant evaluation.

Do air purifiers help with post-nasal drip?

HEPA purifiers reduce indoor allergen load and can lower mucus production if allergies are the main driver.

Is it safe to use nasal decongestant sprays every day?

No. Using decongestant sprays longer than three consecutive days can cause rebound congestion and worsen drip.

Can acid reflux medication stop post-nasal drip entirely?

If reflux is the primary trigger, controlling acid often reduces drip, but you’ll still need to address any coexisting nasal issues.

Will removing my tonsils fix the problem?

Tonsillectomy helps only if enlarged tonsils harbor chronic infection; it has no effect on allergy-related drip.

Does drinking more water thin the mucus?

Staying well hydrated keeps secretions less viscous, making them easier to swallow and less noticeable.

Why do I have post-nasal drip all the time?

What makes mucus drip down the back of my throat day after day?

Post-nasal drip happens when glands in the nose and sinuses make more mucus than usual or when thickened secretions can’t flow forward and instead slide backward. “About 70 % of persistent cases trace back to non-seasonal allergies or chronic rhinitis,” notes Sina Hartung, MMSC-BMI.

Year-round indoor allergens are a top culpritDust-mite, mold, and pet proteins can inflame nasal tissue 12 months a year, driving continuous mucus production even when you feel ‘okay’ otherwise.
Silent acid reflux irritates throat lining nightlyUp to 30 % of people with chronic drip have laryngopharyngeal reflux; stomach acid reaching the throat triggers protective mucus without the classic heartburn.
Vasomotor (non-allergic) rhinitis keeps glands switched onCold air, perfumes, or hormonal changes can activate nasal nerves, causing clear but relentless drainage despite negative allergy tests.
Certain blood-pressure drugs thicken secretionsAce inhibitors and beta-blockers occasionally dry nasal passages, making mucus sticky so it slides backward rather than forward.
Structural problems trap normal mucusA deviated septum or enlarged turbinates block the front outlets; the pooled mucus has no option but to drip toward the throat.
Your nose makes up to two quarts of mucus every dayHoustonSinusSurgery notes that the nasal and sinus glands normally secrete 1–2 quarts of protective mucus in a 24-hour period; the sensation of post-nasal drip arises when this baseline output becomes excessive or unusually thick. (HoustonSinus)

Which post-nasal drip signs mean I should be seen quickly?

Most cases are benign, but a few signal infection or a more serious airway issue. “Seek care fast if symptoms escalate rather than slowly improve,” advises the team at Eureka Health.

Fever above 100.4 °F with green mucus suggests bacterial sinusitisA sudden color change plus high fever after 10 days of cold-like symptoms may point to acute sinus infection needing evaluation.
Drip accompanied by wheeze or shortness of breath can indicate asthma overlapPost-nasal secretions can trigger bronchospasm; unexplained breathlessness needs timely lung assessment.
Single-sided blockage plus bloody discharge raises tumor concernAlthough rare (less than 1 % of cases), unilateral symptoms with bleeding warrant nasal endoscopy or imaging.
Weight loss and night sweats with thick mucus hint at chronic infectionTuberculosis or fungal sinus disease should be ruled out when systemic ‘B symptoms’ accompany drainage.
Persistent drip beyond 10 days signals more than a common coldENT experts warn that "severe post-nasal drip lasts over ten days and has unrelenting symptoms"; ongoing drainage should prompt a same-week evaluation for sinus infection or allergy flare. (KaplanSinus)
Foul-smelling mucus is a bacterial red flagDowntown ENT advises a visit "if your mucus has a strong odor," since odor often points to bacterial sinusitis or, in children, a retained foreign body needing quick removal. (DowntownENT)

Could multiple hidden triggers be working together?

Yes. Up to half of adults with chronic drip have two or more overlapping causes. “A patient might have mild allergies plus acid reflux—treating only one rarely solves the problem,” explains Sina Hartung, MMSC-BMI.

Allergy testing often uncovers a background sensitizationSkin-prick or serum IgE panels reveal unsuspected indoor allergens in 45 % of chronic drip sufferers.
Reflux worsens at night when lying flatGravity no longer keeps stomach contents down, so throat exposure increases between 11 pm and 4 am, exactly when many people notice a need to clear their throat.
Seasonal changes layer new irritants over old onesPollen peaks in spring or fall can stack on top of perennial triggers, briefly doubling mucus volume.
Nasal microbiome imbalance fuels lingering inflammationLow diversity of protective bacteria correlates with higher interleukin-8 levels and thicker secretions in small studies.
Sinusitis alone affects 31 million AmericansURMC notes that inflamed sinuses are a leading post-nasal drip driver, impacting about 31 million people in the United States each year. (URMC)
Clinicians screen for at least ten common drip triggersMemorial Village Sinus & Hearing lists chronic sinusitis, allergies, GERD, selected medications, and six other conditions that can simultaneously fuel persistent mucus. (MVSH)

What home measures can thin the mucus and calm the drip?

Simple mechanical and lifestyle steps relieve many patients within one to two weeks. The team at Eureka Health emphasizes that “consistency matters more than fancy gadgets.”

Saline rinses twice daily wash out allergens and biofilmUsing 240 mL of isotonic saltwater through a squeeze bottle can cut mucus proteins by 50 % after one week.
Humidifying bedroom air to 40–50 % prevents dryingMaintaining mid-range humidity stops secretions from thickening overnight, the time when drip bothers many people most.
Avoiding dairy close to bedtime reduces perceived thicknessMilk proteins can temporarily coat the throat; switching to non-dairy drinks in the evening helps some individuals feel less need to clear their throat.
Elevating the head of the bed by 6 inches curbs reflux-induced dripGravity keeps acid below the upper esophageal sphincter, lowering nocturnal throat irritation by roughly 30 % in controlled trials.
Warm fluids and steady hydration keep mucus flowingFrequent sips of water, tea, or clear broth supply both moisture and gentle heat; Healthline notes that warm beverages help thin the secretions so they drain instead of sticking in the throat. (Healthline)
Steam inhalation for 5–10 minutes loosens thick secretionsSitting in a steamy shower or leaning over a bowl of hot water "helps thin mucus and moisten the nose and throat," giving rapid relief when drip suddenly flares, according to GoodRx’s home-remedy review. (GoodRx)

Which tests and medications are most useful for stubborn cases?

When symptoms last three months despite home care, targeted diagnostics help. “Start with the least invasive: allergy panel, nasal endoscopy, then consider pH probe for reflux,” says Sina Hartung, MMSC-BMI.

Total serum IgE and specific IgE panels confirm allergic rhinitisA level over 100 IU/mL plus positive dust-mite IgE strongly predicts response to allergen avoidance and immunotherapy.
Nasal endoscopy visualizes polyps or septal deviationIn 20 % of chronic drip patients, ENT scoping finds physical blockage amenable to surgery or steroid sprays.
24-hour dual-probe pH monitoring detects silent refluxAn acid exposure time above 4.2 % validates trying acid-suppressing therapy even in the absence of heartburn.
Topical nasal corticosteroids shrink inflamed tissueWhen used once daily for 4–6 weeks, they cut mucus volume by about half in randomized trials; discuss duration and side-effects with a clinician.
Second-generation antihistamines help when allergy provenThese non-sedating agents reduce gland stimulation within 2–3 days, but only if histamine is truly the driver.
Allergen immunotherapy offers a durable option when sprays and pills fall shortThe Denver ENT resource notes that “long-term solutions include allergy shots and drops,” making immunotherapy a reasonable step for patients whose post-nasal drip persists despite conventional medications. (DenverENT)
Short-course oral decongestants can provide rapid relief but should not be used continuouslyHealthline advises pseudoephedrine (Sudafed) for quick symptom control while cautioning that extended use may raise blood pressure or cause rebound congestion, so courses are typically limited to a few days. (Healthline)