Chronic Postnasal Drip: Why It Won't Go Away and What Helps

You clear your throat before every phone call. You swallow constantly, and a tickle in the back of your throat turns into a cough the minute you lie down. You've tried tissues, lozenges, and a few allergy pills, but that steady drip keeps coming back.

Mucus itself is normal and healthy. In fact, the glands in your nose and throat make one to two quarts of mucus every day to keep your airways moist and trap dust and germs. Most of the time, you swallow it without ever noticing. But when that mucus becomes too thick or too plentiful, you start to feel it sliding down the back of your throat. That feeling is postnasal drip, and it usually sticks around until someone treats the reason behind it.

Keep reading to learn the most common causes of chronic postnasal drip, how the right diagnosis leads to better relief, and where you can find personalized, modern care for postnasal drip caused by allergies or chronic sinus conditions.

What Does Chronic Postnasal Drip Feel Like?

Postnasal drip can show up in many small, annoying ways. Many people feel a constant need to clear their throat or swallow. Others notice a scratchy or sore throat, a hoarse voice in the morning, bad breath, or a cough that gets worse at night. Some people even feel queasy from swallowing extra mucus throughout the day. When these symptoms last longer than a few weeks, doctors consider the drip chronic. And at that point, the drip is usually a sign of something else going on in the nose, sinuses, or throat.

Why Won't My Postnasal Drip Go Away?

Postnasal drip is a symptom, so it tends to last as long as its cause does. The most common reasons it lingers include:

• Allergies: Dust mites, pet dander, mold, and pollen can trigger a steady flow of thin, clear mucus.
• Chronic sinusitis: Swollen, blocked sinuses can produce thick yellow or green drainage that lasts for months.
• Nonallergic rhinitis: Also called vasomotor rhinitis, this condition causes an overly sensitive nose that runs in response to cold air, spicy food, perfume, or smoke.
• Silent reflux: Stomach acid that reaches the throat can cause irritation, extra mucus, and constant throat clearing.
• Structural problems: A deviated septum, enlarged turbinates, or nasal polyps can keep mucus from draining the way it should.
• Medications and dry air: Some medicines thicken mucus, and dry indoor air can make it stickier and harder to clear.
• Age: Mucus tends to get thicker as we get older, which can make the drip easier to feel.

Many patients have more than one cause at the same time, which is one reason store-bought remedies only go so far.

Could It Be Something Other Than Allergies?

Allergies get the blame for most postnasal drip, but they are far from the only culprit. If antihistamines haven't helped, two other causes deserve a closer look. Vasomotor rhinitis looks a lot like allergies, but allergy tests come back normal. The nerves in the nose simply overreact to everyday triggers. Silent reflux, also called laryngopharyngeal reflux or LPR, can make you feel like mucus is stuck in your throat even when very little is there. You can learn more about this in our article on how silent reflux affects your throat, voice, and breathing.

A question we regularly hear is, “Why does my postnasal drip get worse at night?” When you lie down, mucus pools at the back of your throat instead of draining down and away. Lying flat also makes it easier for reflux to reach your throat, so both causes tend to flare at bedtime.

How Does Finding the Cause of Postnasal Drip Lead to Better Treatment?

Treating postnasal drip without knowing its cause is a lot like mopping a floor without fixing the leak. Once an ENT finds the source, treatment can target it directly.

Your visit may include a nasal endoscopy, which uses a thin, lighted camera to look deep inside the nose and sinuses. A CT scan can show blocked sinuses or structural problems, and allergy testing can pinpoint your triggers. If reflux seems likely, an exam of the throat and voice box can reveal telltale redness and swelling.

From there, your treatment plan matches what we find. Allergies may call for saline rinses, steroid nasal sprays, allergy shots, or allergy drops. Chronic sinusitis may respond to medication, balloon sinuplasty, or minimally invasive sinus surgery. Vasomotor rhinitis can improve with prescription sprays or ClariFix, an in-office treatment that calms overactive nasal nerves. Reflux usually improves with diet changes, earlier dinners, and acid-reducing medicine. Structural problems may require septoplasty or turbinate reduction.

When Is It Time to See an ENT About Postnasal Drip?

A drip that lasts more than a few weeks deserves an exam, especially if home care and over-the-counter medicine haven't helped. Make an appointment sooner if you notice drainage from only one side of the nose, bloody or foul-smelling mucus, fever, trouble swallowing, or wheezing. 

Where Those Seeking the Best Sinus Doctor in Los Angeles Find Answers

Chronic postnasal drip can wear on your sleep, your voice, and your patience. But once you know what is causing it, the right treatment can finally quiet the drip.

Dr. Payam Daneshrad is a board-certified otolaryngologist who specializes in rhinology, the care of the nose and sinuses. He has served as the team otolaryngologist for the Los Angeles Clippers, and his work has appeared in medical journals. His approach focuses on the most effective treatment with as little pain and downtime as possible, including packing-free nasal surgery and image-guided sinus surgery.

Our clinic brings every step under one roof. We offer in-house CT imaging, allergy testing and immunotherapy, balloon sinuplasty, and ClariFix, so you don't need to bounce between specialists. You can visit us in Santa Monica, just off Santa Monica Boulevard near UCLA Santa Monica Medical Center, or in Torrance on Lomita Boulevard, close to Torrance Memorial Medical Center.