Constant Throat Clearing: Causes and Solutions

Everybody clears their throat on occasion. Throat clearing is an instinctive effort to remove an irritant in the throat. This irritant can be real, or it may just feel real. It can also be a habit you’ve picked up along the way.

Throat clearing is usually harmless, but if it happens frequently, you should investigate the cause. After all, chronic throat clearing can irritate the throat, leading to hoarseness and trouble swallowing. It can also be a sign of a medical condition.

Read on to discover some of the most common causes of chronic throat clearing along with solutions.

Constant Clearing Throat: What’s it All About?

When you clear your throat, you use your throat muscles to expel the irritant. Put simply, you vibrate your vocal chords violently to clear your throat. This action can cause throat pain and irritation, and if it occurs frequently, it can damage the vocal chords.

And the irritant you’re constantly trying to clear is most often phlegm, also called mucus.

Key to Clearing Throat

The key to clearing your throat is to discover the cause of the phlegm. Once you’ve determined the cause, you can proceed to the solution.

So let’s discuss some causes and solutions for phlegm in the throat.

Causes of Constant Phlegm in Throat

Phlegm is quite common, normal, and required for proper bodily function. Your body produces about 1 to 1.5 liters of mucus per day.1

Mucus “oils the engine” so to speak, lubricating your tissues and keeping them from drying out. It also contains antibodies and enzymes that identify and destroy bacteria and germs. This sticky goo even traps dust and germs before they make their way into the rest of your body.2 (The airways are the primary entry point for airborne pathogens and environmental toxins.)

Phlegm is produced by tissue in your throat, lungs, mouth, nose, sinuses, and gastrointestinal tract. Most of the time this mucus drips down your throat unnoticed. But certain conditions can cause the consistency to change, commanding both attention and throat clearing.

Here are a few of the most common causes of persistent phlegm in throat.

Nasal Allergies

Nasal allergies occur when the immune system overreacts to substances (allergens) in the environment that are typically harmless. Typical allergens include:

  • Dust
  • Pollen
  • Animal dander
  • Dust mites
  • Some molds

These allergens can inflame your sinuses and mucus membranes and thicken throat phlegm, leading to frequent throat clearing. This phlegm can also drip down the back of the throat (post-nasal drip) causing hoarseness, sore throat, and painful swallowing.

Symptoms of nasal allergies include:

  • Runny or stuffy nose
  • Sneezing
  • Itchy nose or eyes
  • Post-nasal drip
  • Throat clearing


Treatments for nasal allergies include:

  • Antihistamines
  • OTC Decongestants
  • Steroidal nasal sprays that reduce inflammation of nasal passageways
  • Allergy shots to help your body build up a tolerance to the allergen

Having a treatment can still involve quite a bit of suffering and throat clearing, however. So the best course of action is to avoid the allergen if possible.

Acid Reflux

Laryngopharyngeal reflux (LPR), a type of acid reflux, is also known to cause chronic throat clearing.

In LPR, stomach acid flows backs up into the back of your throat or in the voice box (larynx), irritating the throat. Unlike gastroesophageal reflux disease (GERD), LPR doesn’t cause heartburn. For this reason, LPR is known as “silent reflux”.

GERD and LPR can co-exist. In fact, more than half of the people with GERD may also develop symptoms of LPR.3

Symptoms of LPR include:

  • Cough
  • Wheezing
  • Hoarseness
  • Sore throat


Treatments for either type of acid reflux disease include:

  • Antacids
  • Proton pump inhibitors
  • Losing weight (if overweight)
  • Avoiding reflux-triggering foods
  • Quitting smoking


Asthma is a chronic condition in which the airways narrow and swell, producing extra mucus. The causes of asthma are unknown at this time, but genetic or environmental factors are thought to play a role.

Symptoms of asthma vary widely but can include:

  • Shortness of breath
  • Coughing
  • Wheezing
  • Chest pain or tightness


Treatments vary widely depending upon the type or severity of asthma. Some of the treatment options include:4

  • Long-term medications taken daily to control asthma symptoms. These include oral medications and inhalers.
  • Rescue medications offering quick relief of symptoms. Most rescue medications are inhalers that relax the airways to promote easier breathing. But they also include oral and intravenous corticosteroids for severe asthma flareups.
  • Biologic medications specifically designed for those who suffer from severe asthma attacks

Keep in mind, though, that severe asthma attacks can be a medical emergency. Thus, you should work with your doctor to develop an action plan for your asthma attacks.

Neurological Inflammation

Though neurological inflammation is not often considered one of the causes of throat clearing, it may indeed play a role. While acute brain inflammation is associated with injury or pathogens and constitutes a medical emergency, e.g. meningitis, chronic brain inflammation is different. Its symptoms are subtle and can lead to a host of seemingly unrelated health conditions.

Symptoms of brain inflammation can include mental fatigue, brain fog, and memory problems.5 Health conditions associated with neuroinflammation include:6, 7

  • Anxiety
  • Depression
  • Alzheimer’s disease
  • Parkinson’s disease
  • Schizophrenia
  • Bipolar disorder

And now there is scientific evidence that brain inflammation may be linked to persistent throat clearing and/or coughing.

In a 2020 observational study published in the European Respiratory Journal, researchers discuss the evidence that the inflammation seen in chronic cough may involve neuroinflammation. That’s because studies suggests that neuroinflammation is created by glial cells of the nervous system, cells that may also play a role in chronic pain. (Chronic pain and cough share a similar manner of development.) 8

And chronic cough, of course, also leads to chronic and persistent throat clearing.

Brain inflammation is often caused by poor-quality diet and poor nutrition. But the good news is that it can be reversed through eating healthy foods and taking supplements that include brain-healing nutrients.

How to Clear Your Throat Naturally

One of the best ways to naturally clear your throat of phlegm is to eat a nutritious diet or take supplements that naturally contain anti-inflammatory vitamins and other substances, as this can reduce inflammation in your sinuses, nasal passages, and throat. It can also help reduce brain inflammation.

Here are the best nutrients clinically shown to help reduce brain inflammation, which may in turn help you clear your throat naturally.

Vitamin D

This fat-soluble vitamin promotes calcium absorption and is essential for bone growth. Turns out, it’s also a powerful anti-inflammatory.

In a recent review of 30 studies on vitamin D, researchers noted:

“Studies consistently reported results showing that vitamin D supplementation can downregulate inflammatory pathways of COX-2, TNF-α, NF-κB, and MAPK.”9

And it can soothe brain inflammation. According to multiple scientific studies, vitamin D can pass through the blood-brain barrier and thus influence the central nervous system (brain and spinal cord) via its receptors. 10 Vitamin D deficiency is also associated with impaired cognitive function.11


Acetyl-L-Carnitine (ALC) is a naturally occurring micronutrient known for its neuroprotective properties. For example, studies suggest that supplementing with ALC may fight off neuronal degeneration and prevent age-related cell death throughout the brain.12

In other words, supplementing with ALC could reduce brain inflammation, making it a great solution for chronic throat clearing.

Omega-3 Fatty Acids and Fish Oil

Research indicates that omega-3 fatty acids have potent anti-inflammatory properties.13 They can help your body fight inflammation in your throat, nasal cavity, and other areas, thus relieving the urge to clear your throat.

Fish oil is one of the best sources of omega-3 fatty acids. This is probably the reason multiple research studies indicate that fish is a powerful anti-inflammatory.

For example, one pre-clinical research study showed that a diet enriched with 20% fish oil decreased mucus production and the inflammatory response in mice.14


Citicoline is a naturally occurring chemical found in every cell of your body, especially the brain.

Studies indicate that citicoline provides significant neuroprotection due in part to its ability to defend against free radical damage in brain cells.15 Once in the brain, citicoline is also partially converted to acetylcholine, an important neurotransmitter.

Research suggests that acetylcholine receptors calm the inflammatory response in the brain, thus supporting healthy brain function. This can also minimize throat clearing.

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3- Martinucci I, de Bortoli N, Savarino E, et al. Optimal treatment of laryngopharyngeal reflux disease. Ther Adv Chronic Dis. 2013;4(6):287-301. doi:10.1177/2040622313503485

4- Mayo Clinic Staff. Asthma. Mayo Clinic. Aug 11, 2020. Accessed Apr 27, 2021.

5- Leonie JT, Balter JA, Aldred S, Drayson MT, Jet JCS, van Zanten V, Higgs S, Raymond JE, Mazaheri A. Selective effects of acute low-grade inflammation on human visual attention,

NeuroImage, Volume 202, 2019, 116098, ISSN 1053-8119, (

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7- Schnabel J. The Brain Inflamed. Feb 26, 2015. Accessed Apr 27, 2021.

8- Driessen AK, Devlin AC, Lundy FT, Martin SL, Sergeant GP, Mazzone SB, McGarvey LP. Perspectives on neuroinflammation contributing to chronic cough. Eur Respir J. 2020 Oct 22;56(4):2000758. doi: 10.1183/13993003.00758-2020. PMID: 32646920.

9- Garcia PM, Moore J, Kahan D, Hong MY. Effects of Vitamin D Supplementation on Inflammation, Colonic Cell Kinetics, and Microbiota in Colitis: A Review. Molecules. 2020 May 14;25(10):2300. doi: 10.3390/molecules25102300. PMID: 32422882; PMCID: PMC7288056.

10- Farhangi, M.A., Mesgari-Abbasi, M., Nameni, G. et al. The effects of vitamin D administration on brain inflammatory markers in high fat diet induced obese rats. BMC Neurosci 18, 81 (2017).

11- Pozzi F, Aloe L, Frajese GV, Frajese G. Vitamin D (Calcifediol) Supplementation Modulates NGF and BDNF and Improves Memory Function in Postmenopausal Women: a Pilot Study. Research in Endocrinology, Vol. 2013 (2013), Article ID 552758, DOI: 10.5171/2013.552758

12- P. Juliet Arockia Rani, C. Panneerselvam, Effect of L-Carnitine on Brain Lipid Peroxidation and Antioxidant Enzymes in Old Rats, The Journals of Gerontology: Series A, Volume 57, Issue 4, 1 April 2002, Pages B134–B137,

13- Simopoulos AP. Omega-3 fatty acids in inflammation and autoimmune diseases. J Am Coll Nutr. 2002 Dec;21(6):495-505. doi: 10.1080/07315724.2002.10719248. PMID: 12480795.

14- Hall JA, Hartman J, Skinner MM, et al. Dietary Enrichment with 20% Fish Oil Decreases Mucus Production and the Inflammatory Response in Mice with Ovalbumin-Induced Allergic Lung Inflammation. PLoS One. 2016;11(9):e0163819. Published 2016 Sep 26. doi:10.1371/journal.pone.0163819

15- Adibhatla RM, Hatcher JF, Dempsey RJ. Effects of citicoline on phospholipid and glutathione levels in transient cerebral ischemia. Stroke. 2001 Oct;32(10):2376-81. doi: 10.1161/hs1001.096010. PMID: 11588329.

Chief Medical Director at SANESolution | Website

Dr. Matthew Olesiak continues to make a significant impact in the medical field through his work at SANESolution and his dedication to evidence-based practices.