Laryngitis and Voice Disorders
Table of Contents
Acute Laryngitis
Acute laryngitis is sudden-onset hoarseness lasting less than 3 weeks. The vast majority of cases — approximately 90% — are caused by viral upper respiratory infections: rhinovirus (the common cold virus), influenza, parainfluenza, and adenovirus are the most common culprits. Bacterial laryngitis is rare.
What happens: the virus inflames the lining of the larynx (voicebox) and vocal folds, causing swelling. Swollen vocal folds vibrate less efficiently, producing a hoarse, rough, or weak voice. Speaking becomes effortful and may be painful.
Care for acute viral laryngitis is supportive:
- Voice rest: Voice clinics describe it as the most important measure — talking as little as possible, because every word forces the swollen vocal folds together and slows healing. Complete silence is not described as necessary; less voice use is.
- Whispering: Whispering is harder on the vocal folds than quiet speaking — it requires them to be held tightly together with greater muscular tension. Voice clinics describe a quiet, breathy speaking voice as gentler than a whisper.
- Hydration: Plenty of water is part of supportive care; well-hydrated vocal folds heal faster. Alcohol and caffeine are described as dehydrating.
- Humidification: Home measures described include a cool-mist humidifier at night and breathing steam for 5–10 minutes from a bowl of hot (not boiling) water with a towel over the head.
- Throat clearing: Repeated throat clearing is traumatic to the vocal folds. A hard swallow or a small sip of water are the substitutes voice clinics describe.
- Timeline: Most viral acute laryngitis resolves within 1–2 weeks. The 2018 American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS) hoarseness guideline update states that laryngoscopy (a look at the voice box with a small camera or mirror) is indicated when hoarseness fails to resolve or improve within 4 weeks, or at any time if a serious underlying cause is suspected.
Antibiotics: A Cochrane review of three randomized trials (351 adults; the quality of the evidence was very low) found that antibiotics did not improve objectively measured voice in acute laryngitis. Erythromycin reduced the voice trouble and cough people reported themselves at one and two weeks, and the authors judged that these modest benefits may not outweigh the cost, side effects and the spread of antibiotic resistance. The 2018 guideline update makes a strong recommendation against routinely prescribing antibiotics for hoarseness.
Chronic Laryngitis (Long-Lasting Hoarseness)
Chronic laryngitis is a symptom with an underlying cause, not a final diagnosis in itself. The 2018 guideline update states that laryngoscopy is indicated when hoarseness has not resolved or improved within 4 weeks, or sooner when a serious cause is suspected. Common underlying causes:
- Gastroesophageal reflux disease (GERD) and LPR (laryngopharyngeal reflux): The most common cause of chronic laryngitis. Acid or non-acid reflux that reaches the larynx causes chronic inflammation, thickening of the posterior larynx, and persistent hoarseness.
- Chronic sinusitis with post-nasal drip: Mucus constantly dripping onto the larynx causes chronic irritation, cough, throat clearing, and laryngitis.
- Smoking: Tobacco smoke is directly toxic to the laryngeal mucosa. The 2018 guideline lists a history of tobacco use among the factors that call for an earlier look at the larynx, because of the risk of laryngeal cancer.
- Vocal abuse: Excessive or improper voice use (teachers, singers, coaches, call center workers) causes chronic inflammation and vocal fold changes.
- Inhaled corticosteroids: Inhaled steroids used for asthma (fluticasone, budesonide) can cause local immunosuppression and candidal laryngitis. Rinsing the mouth and gargling after inhaler use is the step described to reduce this.
- Angiotensin-converting enzyme inhibitors (ACE inhibitors): A common antihypertensive medication class that causes chronic cough in 10–15% of users, which in turn traumatizes the larynx. In people with this cough and hoarseness, switching to an angiotensin receptor blocker (losartan, valsartan) is described as eliminating the cough.
- Hypothyroidism: Can cause hoarseness due to myxedematous changes in the larynx. Thyroid replacement resolves this.
LPR (Laryngopharyngeal Reflux)
Laryngopharyngeal reflux is the retrograde flow of gastric contents (acid, pepsin, bile) to the level of the larynx and pharynx. It is distinct from gastroesophageal reflux disease (GERD), and importantly, many LPR patients do not have heartburn — in approximately 40% of LPR cases, there is no classic burning sensation, which is why LPR is often missed or mistaken for other conditions.
LPR symptoms:
- Hoarseness, especially in the morning (acid pooling overnight)
- Chronic throat clearing
- Sensation of a lump in the throat (globus pharyngeus)
- Chronic cough (especially supine or post-meal)
- Excess mucus/post-nasal drip sensation
- Difficulty swallowing
- Bitter taste in the mouth on awakening
Diagnosis: clinical history + laryngoscopy findings (posterior glottic erythema/edema, pachydermia, contact granulomas on vocal process). The Reflux Symptom Index (RSI score >13 is abnormal) quantifies symptoms. pH-impedance testing can confirm LPR when diagnosis is uncertain.
Treatments described:
- Lifestyle: raising the head of the bed 6 inches, no eating within 3 hours of bedtime, and less coffee, alcohol, fatty foods, spicy foods, chocolate and mint (foods described as relaxing the lower esophageal sphincter)
- Proton pump inhibitors (omeprazole, pantoprazole) are widely prescribed for LPR; laryngeal changes are described as taking 6–8 weeks to improve (longer than gastroesophageal reflux disease treatment). The 2018 guideline update recommends against prescribing antireflux medicines for hoarseness alone, based only on symptoms attributed to suspected reflux, before the larynx has been looked at.
- Alginate raft-forming antacids are used for after-meal episodes
- Weight loss for overweight patients significantly reduces reflux events
A 2026 study from two hospitals in Belgium and France followed 145 people whose laryngopharyngeal reflux was confirmed by 24-hour testing. After 3 months, the share whose symptoms responded was 81.2% (39 of 48) with a strict antireflux diet plus stress-reduction activities, 56.3% (18 of 32) with proton pump inhibitors, 57.9% (22 of 38) with alginates and 74.1% (20 of 27) with antacids. The study was not randomized, and its author states that randomized trials comparing the four approaches are needed.
Vocal Cord Nodules and Polyps
Vocal cord nodules and polyps are benign growths on the vocal folds that cause persistent hoarseness:
- Vocal Cord Nodules ("Singer's Nodes"): Small, symmetrical, callus-like thickenings at the midpoint of both vocal folds — the area of maximum vibratory trauma. Caused by chronic vocal abuse or misuse: teachers, coaches, singers, and anyone who speaks loudly in noisy environments. Like calluses on hands, they develop from repeated friction trauma. The voice becomes rough, breathy, and fatigues easily. Voice therapy with a speech-language pathologist is the first-line treatment and very effective. Surgery is rarely needed and is generally considered only after about 6 months of voice therapy.
- Vocal Cord Polyps: Fluid-filled or fibrous unilateral growths on the vocal fold, typically at the mid-membranous portion. Usually caused by a single episode of acute vocal trauma (shouting at a concert, prolonged coughing) rather than chronic abuse. The voice has a rough, gravelly quality with a low pitch. Small polyps may respond to voice therapy; larger polyps usually require microlaryngoscopic surgical removal.
- Vocal Cord Cysts: Submucosal fluid-filled cysts that bulge into the vocal fold, causing asymmetric vibration and hoarseness. Require surgical excision for resolution.
All of these require laryngoscopy (ideally stroboscopy — a special strobe light laryngoscopy that visualizes mucosal wave motion) for accurate diagnosis. A speech-language pathologist specializing in voice disorders is an essential member of the care team.
Spasmodic Dysphonia
Spasmodic dysphonia (SD) is a focal laryngeal dystonia — a neurological movement disorder causing involuntary, irregular spasms of the laryngeal muscles during speaking. It produces a characteristic voice quality:
- Adductor spasmodic dysphonia (most common, ~80%): Spasms of the muscles that close the vocal folds. The voice sounds strained, strangled, or "squeezed," with voice breaks on vowels. Talking feels like "pushing" or "squeezing" words out.
- Abductor spasmodic dysphonia (~20%): Spasms of the muscles that open the vocal folds. The voice sounds breathy and whispered, with voice breaks on voiceless consonants.
Spasmodic dysphonia is often misdiagnosed for years as a psychological problem or "vocal anxiety" — it is not. It is a neurological condition affecting the basal ganglia motor circuit that controls laryngeal muscles.
Treatment:
- Botulinum toxin (onabotulinumtoxinA) injection: The gold-standard treatment; the 2018 guideline update recommends that it be offered for spasmodic dysphonia and other laryngeal dystonias. Small amounts of botulinum toxin are injected directly into the affected laryngeal muscles (thyroarytenoid for the adductor type, posterior cricoarytenoid for the abductor type), guided by electromyography (a recording of the muscles’ electrical activity). In a 12-year series of more than 900 patients, people with the adductor type had an average benefit of 90% of normal function, lasting an average of 15.1 weeks; people with the abductor type had an average benefit of 66.7%, lasting 10.5 weeks. Effects last 3–4 months, requiring repeated injections. Voice becomes breathy for 1–2 weeks after injection then improves dramatically.
- Voice therapy: Not curative for spasmodic dysphonia but can improve overall voice function and help patients use their voice more efficiently.
- Surgical options: Selective laryngeal adductor denervation-reinnervation (SLAD-R) — a surgical procedure that selectively cuts and reinnervates the adductor muscles of the larynx. Provides longer-lasting results than botulinum toxin injections but is performed at only a few specialized centers.
- Sodium oxybate (a medicine taken by mouth, under study): In a 2025 placebo-controlled crossover trial in 106 people with laryngeal dystonia (another name for spasmodic dysphonia), a single 1.5 g dose of sodium oxybate improved symptoms in people whose voice improves after drinking alcohol, with an average benefit of about 41%; it did not significantly help people whose voice does not improve with alcohol. The effect wore off by 300 minutes after the dose. The common side effects were mild dizziness, nausea and daytime sleepiness.
Laryngeal Cancer Red Flags
Laryngeal cancer (cancer of the voicebox) is not rare — the U.S. National Cancer Institute’s SEER (Surveillance, Epidemiology, and End Results) program estimates 12,290 new cases in the United States in 2026. The most important fact: when caught early, it is highly curable. Glottic (vocal cord) cancer typically presents with early hoarseness. SEER reports a 5-year relative survival of 79.8% for laryngeal cancer found while still localized, and 62.5% across all stages (2016–2022). The tragedy is when hoarseness is ignored or attributed to laryngitis for months.
Signs clinicians treat as reasons for urgent laryngoscopy:
- Hoarseness that has not improved within 4 weeks (the 2018 guideline threshold); the guideline lists tobacco use among the factors that call for an earlier look, and heavy drinking adds to the risk (see below)
- Difficulty swallowing (dysphagia)
- Pain with swallowing (odynophagia)
- Unexplained ear pain (referred otalgia via cranial nerve X, the vagus nerve)
- Neck mass (lymph node metastasis)
- Stridor (high-pitched breathing sound indicating airway obstruction)
- Coughing up blood (hemoptysis)
Risk factors for laryngeal cancer:
- Tobacco smoking: By far the most important risk factor. Smokers have 15× the laryngeal cancer risk of non-smokers. The risk is dose- and duration-dependent.
- Alcohol: Alcohol and tobacco have a synergistic (multiplicative, not just additive) effect on laryngeal cancer risk. Together they increase risk 30-fold or more.
- Human Papillomavirus (HPV) type 16: Increasingly recognized as a cause of supraglottic and hypopharyngeal cancers. Human papillomavirus vaccination prevents human papillomavirus type 16 infection and is recommended routinely for adolescents.
- GERD/LPR: Chronic acid exposure may be a contributing factor, though the evidence is less strong than for tobacco/alcohol.
The take-home: hoarseness lasting weeks in a person who smokes is the pattern the 2018 guideline singles out for an early look at the larynx, and drinking multiplies the risk; delay matters because early laryngeal cancer is highly curable.
Vocal Hygiene and Prevention
Vocal hygiene is a set of behaviors that protect the vocal folds and promote voice health:
- Hydration: Voice-care guides commonly cite about 8 cups of water a day. The vocal folds need to be well-lubricated to vibrate efficiently. Systemic hydration matters more than directly moistening the throat (water you swallow goes to the stomach, not directly onto the vocal folds).
- Limiting heavy voice use: "Vocal naps" — brief periods of voice rest — are described for days with heavy speaking ahead.
- Microphone and amplification: Voice clinics describe using a microphone for public speaking or teaching. Projecting the voice over background noise is one of the most common causes of vocal injury.
- Warming up before singing or extended speaking: Like any muscular activity, the larynx benefits from a warm-up — gentle humming and easy glides are the exercises described before demanding voice use.
- Throat clearing: Throat clearing slams the vocal folds together with great force; a firm swallow or a soft, breathy "hh-hh" cough are the substitutes described.
- Reflux: LPR worsens vocal quality and increases vocal fold vulnerability to injury.
- Stopping smoking: Described as the single most impactful change a smoker can make for voice health — and cancer prevention.
Signs That Call for a Look at the Larynx
Most hoarseness resolves on its own with voice rest. The 2018 guideline update and voice clinics describe these situations as reasons to have the larynx examined:
- Hoarseness that has not resolved or improved within 4 weeks
- Persistent hoarseness in a person who smokes or drinks heavily
- Difficulty breathing or noisy, high-pitched breathing (stridor) alongside hoarseness — signs hospitals treat as urgent
- A neck lump
- Pain when speaking or swallowing
- A voice change in someone who uses the voice professionally (teacher, singer, lawyer) — the guideline lists professional voice use among the reasons for an earlier look
- Hoarseness after recent surgery on the head, neck or chest, or after a breathing tube (intubation) — also on the guideline’s list
- Hoarseness that comes on suddenly with no clear cause
Key Research Papers
Key peer-reviewed studies on laryngeal conditions and voice disorders. Each PMID link opens the study on PubMed.
- Stachler RJ, Francis DO, Schwartz SR, Damask CC, Digoy GP, Krouse HJ, McCoy SJ, Ouellette DR, Patel RR, Reavis CCW, Smith LJ, Smith M, Strode SW, Woo P, Nnacheta LC. Clinical Practice Guideline: Hoarseness (Dysphonia) (Update) Executive Summary. Otolaryngol Head Neck Surg. 2018;158(3):409-426. — PubMed PMID: 29494316
- Reveiz L, Cardona AF. Antibiotics for acute laryngitis in adults. Cochrane Database Syst Rev. 2015;2015(5):CD004783. — PubMed PMID: 26002823
- Koufman JA, Aviv JE, Casiano RR, Shaw GY. Laryngopharyngeal reflux: position statement of the committee on speech, voice, and swallowing disorders of the American Academy of Otolaryngology-Head and Neck Surgery. Otolaryngol Head Neck Surg. 2002;127(1):32-35. — PubMed PMID: 12161727
- Verdolini K, Ramig LO. Review: occupational risks for voice problems. Logoped Phoniatr Vocol. 2001;26(1):37-46. — PubMed PMID: 11432413
- Blitzer A, Brin MF, Stewart CF. Botulinum toxin management of spasmodic dysphonia (laryngeal dystonia): a 12-year experience in more than 900 patients. Laryngoscope. 1998;108(10):1435-1441. — PubMed PMID: 9778279
- Siupsinskiene N, Adamonis K, Toohill RJ. Quality of life in laryngopharyngeal reflux patients. Laryngoscope. 2007;117(3):480-484. — PubMed PMID: 17334308
- Dedo HH, Izdebski K. Problems with surgical (RLN section) treatment of spastic dysphonia. Laryngoscope. 1983;93(3):268-271. — PubMed PMID: 6834947
- Tauber S, Gross M, Issing WJ. Association of laryngopharyngeal symptoms with gastroesophageal reflux disease. Laryngoscope. 2002;112(5):879-886. — PubMed PMID: 12150622
- Zeitels SM, Hillman RE, Franco RA, Bunting GW. Voice and treatment outcome from phonosurgical management of early glottic cancer. Ann Otol Rhinol Laryngol Suppl. 2002;190:3-20. — PubMed PMID: 12498379
- Lechien JR. Comparison of Diet and Lifestyle Program With 3 Medication Approaches for Laryngopharyngeal Reflux Disease Management. JAMA Otolaryngol Head Neck Surg. 2026;152(8):816-821. — PubMed PMID: 42390846
- Simonyan K, O'Flynn LC, Hamzehei Sichani A, Frucht SJ, Rumbach AF, Sharma N, Song PC, Worthley A. Efficacy and Safety of Sodium Oxybate in Isolated Focal Laryngeal Dystonia: A Phase IIb Double-Blind Placebo-Controlled Cross-Over Randomized Clinical Trial. Ann Neurol. 2025;97(2):329-343. — PubMed PMID: 39565101
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