Why Do I Keep Clearing My Throat? Common Causes

Why does throat clearing become chronic?

Occasional throat clearing is normal. When it becomes a near-constant habit — occurring dozens of times a day, day after day — it usually signals one of a small set of underlying conditions. The act of throat clearing itself can irritate the vocal cords, creating a cycle where clearing the throat makes the irritation worse, which prompts more clearing.

Clinicians classify chronic throat clearing as a form of unexplained or upper airway-related cough, meaning it arises from conditions affecting the region from the nose and sinuses through the larynx.

What are the most common causes?

Postnasal drip is one of the most frequent causes. When mucus from the nose and sinuses drains down the back of the throat, the body's reflex response is to clear it. Postnasal drip intensifies with upper respiratory infections, allergic rhinitis, and chronic sinusitis. It often worsens in cold or dry air, and people may notice it most in the morning or when lying down.

Laryngopharyngeal reflux (LPR) occurs when stomach acid or digestive enzymes travel up into the throat and larynx. Unlike classic heartburn, LPR often presents without chest discomfort — instead causing throat clearing, hoarseness, a sensation of a lump (globus), chronic cough, or throat irritation. The acid does not need to reach high levels to irritate sensitive laryngeal tissue. LPR is considered a variant of gastroesophageal reflux disease (GERD) 1Ref 1Yadlapati R, Gyawali CP, Pandolfino JE; CGIT GERD Consensus Conference Participants (2022).AGA Clinical Practice Update on the Personalized Approach to the Evaluation and Management of GERD: Expert Review.LPR as a form of GERD; dietary and pharmacologic management of reflux reaching the throat.

Allergic rhinitis drives mucus overproduction and postnasal drip and is a common underlying cause. Seasonal or perennial allergic triggers can keep the throat-clearing reflex chronically active 2Ref 2Seidman MD, Gurgel RK, Lin SY, Schwartz SR, Baroody FM, Bonner JR, et al. (2015).Clinical Practice Guideline: Allergic Rhinitis.Allergic rhinitis and postnasal drip as a common cause of chronic throat clearing; nasal corticosteroid sprays and antihistamines as treatment.

Chronic sinusitis causes ongoing mucus drainage from the sinuses into the pharynx, perpetuating the clearing reflex 3Ref 3Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Kumar KA, Kramper M, et al. (2015).Clinical Practice Guideline (Update): Adult Sinusitis.Chronic sinusitis as a cause of postnasal drip contributing to chronic throat clearing.

What less common causes should be considered?

• Vocal cord dysfunction or irritation — the vocal cords themselves may be hypersensitive or have polyps, nodules, or other changes requiring laryngoscopy to see
• Habit or motor tic — in some people, especially with a history of anxiety, throat clearing persists as a learned behavior even after the original trigger has resolved; it may be part of a broader tic disorder
• Medications — ACE inhibitors (a class of blood pressure medications) commonly cause a dry cough that can feel like the need to clear the throat; angiotensin receptor blockers (ARBs) are typically substituted
• Dry air or environmental irritants — low humidity, smoke, or occupational exposures can keep the throat persistently irritated
• Thyroid enlargement — a large thyroid gland can create a sensation of pressure in the throat

How is the cause identified?

A clinician will ask about the character and timing of the throat clearing, whether it is worse after meals or at night (suggesting LPR), whether nasal congestion or allergy symptoms accompany it, whether any new medications were started around the time it began, and whether there is any change in voice.

Examination includes looking at the back of the throat and the nasal passages. If LPR or vocal cord pathology is suspected, an ENT can perform a flexible laryngoscopy — a quick, in-office procedure using a thin scope through the nose to view the vocal cords and larynx directly.

A CHEST expert cough panel guideline notes that the upper airway (sinuses, nose, and throat) is a primary source of chronic cough and throat-clearing syndromes, and a systematic, anatomic approach to evaluation is most reliable 4Ref 4Irwin RS, French CL, Chang AB, Altman KW; CHEST Expert Cough Panel (2018).Classification of Cough as a Symptom in Adults and Management Algorithms: CHEST Guideline and Expert Panel Report.Upper airway as a primary source of chronic cough and throat-clearing syndromes; systematic anatomic evaluation approach.

What helps?

Treatment targets the underlying driver:

• Postnasal drip / allergic rhinitis: Nasal corticosteroid sprays, antihistamines, and saline irrigation 2Ref 2Seidman MD, Gurgel RK, Lin SY, Schwartz SR, Baroody FM, Bonner JR, et al. (2015).Clinical Practice Guideline: Allergic Rhinitis.Allergic rhinitis and postnasal drip as a common cause of chronic throat clearing; nasal corticosteroid sprays and antihistamines as treatment
• LPR: Dietary changes (reducing acidic, fatty, spicy foods; avoiding late meals), elevating the head of the bed, weight loss if applicable, and acid-suppression therapy 1Ref 1Yadlapati R, Gyawali CP, Pandolfino JE; CGIT GERD Consensus Conference Participants (2022).AGA Clinical Practice Update on the Personalized Approach to the Evaluation and Management of GERD: Expert Review.LPR as a form of GERD; dietary and pharmacologic management of reflux reaching the throat
• Habit clearing: Voice therapy with a speech-language pathologist, who can teach techniques to reduce the reflex and break the cycle
• ACE inhibitor cough: Switching to an ARB after discussion with your prescribing clinician

A Gale primary care clinician can evaluate the likely cause and guide treatment, or refer you to an ENT when laryngoscopy or further assessment is needed.