Vocal Injury Treatment & Prevention Tips
Vocal Injury Treatment & Prevention Tips
Key Takeaways
Vocal rest is the cornerstone of recovery from most vocal injuries, with complete voice rest needed for severe cases and modified voice use for milder conditions
Proper hydration (8-10 glasses daily) and maintaining 40-60% humidity levels are essential preventative measures that significantly reduce your risk of vocal injury
Early intervention with a speech-language pathologist can prevent minor vocal strain from developing into more serious conditions requiring surgical intervention
Vocal injuries often present with persistent hoarseness lasting more than two weeks, reduced range, and increased effort when speaking
DreamVoice and Ramsey Voice Studio provide comprehensive vocal health resources to help singers and speakers maintain optimal vocal technique throughout their careers
Your voice is your instrument, your identity, and for many, your livelihood. When vocal injury strikes, it can be devastating both personally and professionally. Understanding how to identify, treat, and prevent vocal injuries is crucial for anyone who relies on their voice—whether you're a singer, teacher, public speaker, or call center employee.
Signs You Might Have a Vocal Injury
Recognizing the early signs of vocal injury can mean the difference between a quick recovery and a chronic condition requiring intensive treatment. Many professionals push through discomfort, unknowingly causing further damage that could have been avoided with prompt attention.
Common Vocal Injury Symptoms to Watch For
Persistent hoarseness lasting more than two weeks
Voice breaks or cracks during normal speech
Reduced vocal range, especially in higher registers
Vocal fatigue after minimal use
Breathy or airy voice quality
Pain or discomfort when speaking or singing
Constant urge to clear your throat
If you're experiencing several of these symptoms simultaneously or have been dealing with one persistent issue for more than 14 days, it's time to consider professional evaluation. According to the National Institute on Deafness and Other Communication Disorders, ignoring these warning signs can lead to more severe damage requiring extensive treatment.
How Healthy Vocal Cords Work vs. Injured Ones
Healthy vocal cords (or vocal folds) are smooth, flexible tissues that vibrate hundreds of times per second to create sound. When properly functioning, they close completely during phonation with just the right amount of pressure—not too tight, not too loose. The mucosal wave, a rippling movement along the vocal fold surface, flows smoothly and symmetrically. For singers, maintaining vocal health is crucial to ensuring these functions remain optimal.
In contrast, injured vocal cords show visible irregularities. Nodules appear as symmetrical callus-like growths on both folds, while polyps typically form on just one side. Vocal hemorrhage presents as redness from broken blood vessels, and vocal fold paralysis prevents proper closure. These physical changes disrupt the delicate vibratory pattern necessary for clean, effortless sound production.
When Hoarseness Is More Than Just Fatigue
Temporary hoarseness after a long day of talking or a challenging vocal performance is normal. However, persistent hoarseness that doesn't improve with rest signals something more concerning. The distinction lies in recovery time—vocal fatigue typically resolves within 24-48 hours with appropriate rest, while injury-related hoarseness persists despite vocal conservation efforts.
When normal speaking requires increased effort, or your voice consistently sounds different than usual, these are red flags that warrant attention. Professional vocalists often notice subtle changes before they become apparent to others—a slightly delayed onset of sound, reduced flexibility, or loss of certain tonal qualities. Trust these intuitive signals, as they frequently indicate underlying vocal fold changes before more obvious symptoms emerge.
5 Proven Medical Treatments for Vocal Injuries
Treatment approaches for vocal injuries vary based on severity, type of injury, and individual factors. Working with medical professionals who specialize in voice disorders ensures you receive appropriate care tailored to your specific condition and vocal demands.
1. Voice Rest: Why It's Critical and How to Do It Right
Voice rest remains the foundational treatment for most vocal injuries. For severe cases like vocal hemorrhage, complete voice rest (total silence) may be prescribed for 7-10 days. More commonly, modified voice rest allows for limited, gentle speaking while eliminating singing, shouting, whispering, and extensive talking.
Contrary to popular belief, whispering is not easier on injured vocal cords—it actually increases strain by forcing air through partially closed vocal folds. Instead, when speaking during modified voice rest, use a relaxed, forward-focused tone at a comfortable pitch. Electronic amplification can help reduce vocal effort while maintaining necessary communication.
2. Voice Therapy with a Speech-Language Pathologist
Voice therapy conducted by a qualified speech-language pathologist (SLP) is often the frontline treatment for vocal injuries. These specialists design personalized rehabilitation programs that address your specific vocal issues while considering your professional and personal voice demands. A typical therapy regimen includes exercises to improve vocal technique, reduce harmful compensatory behaviors, and gradually rebuild vocal endurance.
SLPs trained in voice therapy employ evidence-based techniques such as resonant voice therapy, vocal function exercises, and semi-occluded vocal tract exercises (like straw phonation) to promote healing. These approaches facilitate proper vocal fold vibration while minimizing harmful collision forces. Research from the American Speech-Language-Hearing Association shows that professional voice therapy can resolve or significantly improve many vocal injuries without the need for more invasive treatments.
3. Anti-inflammatory Medications
Inflammation often accompanies vocal injuries, creating a cycle where swelling leads to compensatory behaviors that cause further irritation. Your ENT specialist might prescribe anti-inflammatory medications to break this cycle and create optimal conditions for healing. These may include corticosteroids (oral or inhaled), proton pump inhibitors for reflux-related inflammation, or non-steroidal anti-inflammatory drugs for short-term use.
For performers with acute vocal fold inflammation before critical performances, some specialists may recommend corticosteroid injections directly into the vocal folds. However, this intervention is typically reserved for specific situations and is not a routine treatment option. It's crucial to understand that while medications can reduce inflammation, they don't address underlying technical issues or vocal habits that may have contributed to the injury.
4. Surgical Options for Nodules and Polyps
When conservative treatments fail to resolve structural abnormalities like nodules, polyps, or cysts, surgical intervention may become necessary. Phonosurgery is a specialized field focusing on preserving or enhancing voice quality while addressing pathology. Modern vocal fold surgeries are incredibly precise, often utilizing microsurgical techniques that minimize trauma to surrounding healthy tissue.
The decision to pursue surgery should never be taken lightly, particularly for professional voice users. Most reputable laryngologists will exhaust non-surgical options first and only recommend surgery when other approaches have proven insufficient. Post-surgical voice therapy is essential for optimal recovery and prevention of recurrence, as the same behaviors that caused the initial injury could lead to new problems if not addressed.
5. Recovery Timeline: What to Expect
Recovery from vocal injuries follows a predictable pattern, though individual timelines vary based on injury severity, compliance with treatment, and underlying vocal demands. Minor injuries like acute laryngitis typically resolve within 1-2 weeks with appropriate voice rest and hydration. Moderate conditions such as early nodules may require 4-6 weeks of voice therapy alongside modified voice use to see significant improvement.
More severe injuries or those requiring surgical intervention have longer recovery trajectories. Post-surgical voice rest is typically mandatory for 3-7 days, followed by gradual voice use under the guidance of a speech-language pathologist. Full recovery, including rehabilitation and return to professional voice use, often spans 2-3 months. Throughout this process, patience is essential—rushing recovery often leads to setbacks that ultimately extend the healing timeline.
Stay Hydrated to Prevent Vocal Damage
Hydration is perhaps the simplest yet most overlooked aspect of vocal health. The vocal folds require adequate moisture to function optimally, with dehydration being a primary contributor to vocal fatigue and increased injury risk. Ramsey Voice Studio and DreamVoice emphasizes hydration as a cornerstone of vocal injury prevention, backed by extensive research showing its protective effects.
How Much Water Professional Voice Users Need Daily
Professional voice users should aim for 8-10 eight-ounce glasses of water daily as a baseline, with additional intake during periods of vocal exertion, exercise, or exposure to drying conditions like air travel or heated environments. This exceeds general recommendations because vocalists and speakers experience greater fluid loss through respiration during extended voice use.
Systemic hydration requires consistency—drinking a large quantity of water immediately before a performance won't adequately hydrate the vocal fold tissues. Instead, maintaining steady hydration throughout the day creates optimal conditions for vocal endurance and injury resistance. Timing matters too; reduce intake 30-60 minutes before performances to avoid discomfort, but maintain hydration up to that point and resume afterward.
Why Humidity Matters for Vocal Health
The moisture level in the air you breathe directly impacts vocal fold surface hydration. Ideal ambient humidity for vocal health ranges from 40-60%, yet many performance venues, classrooms, and office environments fall well below this threshold. Dry air continuously pulls moisture from the vocal fold surface during respiration, creating friction that increases injury susceptibility.
Combat environmental dryness with portable humidifiers in sleeping areas and workspaces. Steam inhalation before and after extended voice use provides direct hydration to the vocal tract surfaces. For travelers and performers in varying environments, personal steam inhalers have become essential equipment, offering targeted humidity when environmental conditions can't be controlled. These practices create a protective moisture barrier on the vocal fold surface that reduces the traumatic effects of vibration.
Breathing and Vocal Technique Fundamentals
Proper breathing and vocal technique aren't just about producing better sound—they're fundamental to preventing vocal injury. Most vocal damage stems from compensatory behaviors that develop when foundational technique is lacking. By mastering these essentials, you create a sustainable approach to voice production that can withstand professional demands.
Essential Warm-up Exercises
Just as athletes warm up before competition, vocalists must prepare their instrument before extended use. An effective warm-up routine gradually awakens the vocal mechanism, increases blood flow to the laryngeal muscles, and distributes mucus evenly across the vocal fold surface. Begin with gentle lip trills, tongue trills, or humming exercises that encourage easy phonation without strain.
Progress to gentle glides that gradually expand your range, moving through comfortable pitches before approaching extremes. Effective warm-ups focus on establishing coordination between breathing and phonation rather than achieving maximum range immediately. The entire process typically requires 10-15 minutes, with more extensive warm-ups needed for demanding performances or cold environments.
5-Minute Emergency Vocal Warm-Up
1. Gentle lip trills on comfortable pitches (1 minute)
2. Humming glides within mid-range (1 minute)
3. Easy vowel sequences (mum-may-me-mo-moo) on 5-note scales (1 minute)
4. Gentle speech-level phrases with forward resonance (1 minute)
5. Range extension exercises approaching performance requirements (1 minute)
Remember that warm-ups should never cause discomfort or strain. If you notice vocal fatigue during warm-up exercises, reduce intensity immediately and focus on gentler approaches. A proper warm-up leaves your voice feeling more accessible and responsive, never tired or stressed.
Cool-down Routines to Prevent Injury
While warm-ups receive considerable attention, cool-down routines are equally important yet often neglected. After extended voice use, the vocal folds experience increased blood flow and slight swelling—a natural physiological response. A proper cool-down helps normalize this tissue state, reducing recovery time and preventing cumulative damage.
Effective cool-downs typically include gentle descending scales, light humming exercises, and progressive reduction in volume and range. These exercises should take 5-10 minutes and feel soothing rather than challenging. For speakers who have used increased projection or singers who have utilized extreme ranges, cool-downs are particularly crucial to restore normal vocal fold function.
Implementing a consistent cool-down routine after performances, presentations, or teaching sessions can significantly reduce next-day vocal fatigue. This practice proves especially beneficial for individuals with consecutive days of heavy voice use, as it minimizes the compounding effects of repeated vocal stress.
Flow Phonation Techniques
Many vocal injuries stem from excessive compression—too much vocal fold pressure during sound production. Flow phonation techniques counter this tendency by encouraging balanced airflow and appropriate vocal fold closure. These approaches emphasize the sensation of "flowing" sound rather than "pushing" or "pressing" the voice.
Semi-occluded vocal tract exercises (SOVT) like straw phonation effectively establish flow phonation patterns. By creating back-pressure in the vocal tract, these exercises encourage efficient vocal fold vibration with minimal collision forces. Practice by phonating through a small straw placed between the lips, focusing on maintaining easy, consistent sound without straining.
As you master flow phonation in exercises, gradually incorporate this sensation into speech and singing. The resulting sound possesses clarity without excessive pressure—a sustainable approach that dramatically reduces injury risk while enhancing vocal longevity.
Lifestyle Changes That Protect Your Voice
Your vocal health extends far beyond what happens during actual voice use. Daily lifestyle choices significantly impact vocal fold resilience and recovery capacity. By addressing these factors, you create an environment where your voice can thrive despite professional demands. For more tips, explore vocal health for singers.
Professional voice users must approach these considerations with particular attention, recognizing that habits tolerated by casual speakers often prove problematic for those with extensive vocal requirements. The cumulative impact of seemingly minor irritants can make the difference between vocal sustainability and recurring injury.
Foods and Drinks That Cause Vocal Inflammation
What you consume directly affects vocal fold tissue condition. Dairy products increase mucus thickness for many individuals, creating a sensation of needing to clear the throat—a behavior that traumatizes vocal fold tissue. Caffeine and alcohol cause dehydration while also relaxing muscles that control reflux, potentially allowing stomach acid to reach and irritate the larynx.
Spicy, acidic, and fatty foods frequently trigger reflux episodes that damage vocal fold tissue, even without causing heartburn symptoms. This "silent reflux" particularly affects singers and speakers who perform after evening meals. Consider eliminating or significantly reducing these potential irritants, especially before important vocal performances or presentations.
Instead, prioritize anti-inflammatory foods like leafy greens, berries, fatty fish, and turmeric, which may help reduce tissue inflammation throughout the body, including the vocal mechanism. Consuming vocal-friendly meals—typically lighter fare focused on lean proteins and non-acidic fruits and vegetables—before performances can noticeably improve vocal endurance and clarity.
Sleep's Impact on Vocal Recovery
Quality sleep directly correlates with vocal health, as tissue repair processes accelerate during deep sleep cycles. Professional voice users should prioritize 7-9 hours of consistent, quality sleep nightly, with additional rest during periods of intensive voice use. Sleep deprivation impairs fine motor control, reducing the precision of laryngeal muscle coordination essential for healthy phonation.
Sleeping position also impacts vocal health, particularly for those with reflux tendencies. Elevating the head 4-6 inches during sleep significantly reduces nighttime reflux episodes that damage vocal fold tissue. Additionally, maintaining adequate bedroom humidity prevents the throat dryness that commonly occurs during mouth breathing while sleeping.
Smoking and Other Harmful Irritants
Smoking represents perhaps the most destructive voluntary behavior for vocal health. The heat and chemical irritants in cigarette smoke cause immediate vocal fold edema (swelling) while contributing to long-term tissue changes that permanently alter voice quality. Even secondary smoke exposure significantly impacts vocal health, particularly for sensitive individuals.
Other inhaled irritants—including vaping products, recreational drugs, and environmental pollutants—similarly damage vocal fold tissue. Professional voice users should rigorously avoid these exposures, considering air quality when selecting performance venues, teaching spaces, and living environments. Portable air purifiers can help mitigate unavoidable environmental exposures during travel or temporary accommodations.
Vocal professionals who smoke face dramatically increased injury risks and compromised recovery capacity. While smoking cessation proves challenging, its benefits for vocal health appear almost immediately, with significant improvements in tissue condition observable within weeks of quitting.
Managing Acid Reflux for Better Vocal Health
Laryngopharyngeal reflux (LPR)—often called silent reflux—represents a primary contributor to chronic vocal injury. Unlike typical heartburn, LPR may present solely as vocal symptoms: morning hoarseness, chronic throat clearing, sensation of a lump in the throat, or persistent cough. Even occasional reflux events can damage delicate vocal fold tissue, creating vulnerability to further injury during voice use.
Dietary modifications provide the first line of defense against reflux-related vocal damage. Avoid eating within three hours of bedtime, limit portion sizes, and reduce known triggers including caffeine, alcohol, chocolate, tomatoes, citrus, and fatty foods. For many voice professionals, these changes alone significantly improve vocal consistency and reduce injury susceptibility.
When dietary approaches prove insufficient, medical interventions may help manage reflux-related vocal symptoms. Proton pump inhibitors or H2 blockers reduce stomach acid production, while antacids neutralize existing acid. Always consult a physician regarding these medications, as long-term use requires appropriate medical supervision.
Controlling Environmental Factors
The environments where you live, work, and perform significantly impact vocal health. Dry air continuously draws moisture from vocal fold surfaces during respiration, increasing friction during phonation. Combat this by maintaining 40-60% humidity in living and working spaces using humidifiers, especially during winter months or in arid climates.
Airborne irritants including dust, pollen, mold, and chemical fumes trigger inflammatory responses in sensitive respiratory tissues. Use high-quality air purifiers in spaces where you spend significant time, particularly bedrooms where extended exposure occurs. When traveling, portable steamers or shower techniques can temporarily compensate for unfavorable environmental conditions.
Background noise levels directly impact vocal injury risk by necessitating increased volume and effort. The "Lombard effect"—our natural tendency to raise our voices in noisy environments—often triggers compensatory behaviors that strain vocal tissues. Whenever possible, modify environments to reduce competing noise, or utilize amplification to maintain comfortable phonation levels despite environmental challenges.
Environmental Factor
Ideal Range
Solution for Poor Conditions
Humidity
40-60%
Humidifiers, steam inhalation
Temperature
68-72°F (20-22°C)
Layered clothing, warm beverages
Background Noise
<35 dB for speaking
Amplification, acoustic treatments
Air Quality
AQI <50
HEPA filtration, masks when necessary
Professional voice users should develop environmental awareness, learning to quickly assess and adapt to conditions that might compromise vocal health. This heightened consciousness becomes particularly important during travel, when rapidly changing environments create additional challenges for maintaining vocal consistency.
When to See an ENT Specialist
While preventive measures and proper technique significantly reduce vocal injury risk, certain symptoms warrant professional medical evaluation. Timely intervention often prevents minor issues from developing into career-threatening conditions, particularly when specialized care addresses the specific needs of professional voice users.
The relationship between otolaryngologists (ENT specialists), speech-language pathologists, and singing teachers creates a comprehensive care team for injured voices. Each professional contributes unique expertise to the evaluation, treatment, and rehabilitation process, with communication between team members optimizing outcomes for complex vocal injuries.
Red Flags That Require Immediate Medical Attention
Seek prompt evaluation from an ENT specialist if you experience voice changes lasting more than two weeks, complete voice loss for more than a few days, pain during phonation, coughing up blood, or difficulty swallowing or breathing. These symptoms may indicate conditions requiring medical intervention beyond voice rest or technique modification, and delays in treatment often lead to more extensive recovery periods or permanent vocal changes.
What to Expect During a Vocal Examination
A comprehensive vocal evaluation typically begins with a detailed history of your symptoms, voice use patterns, and relevant medical conditions. This information guides the physical examination, helping the specialist identify potential contributing factors that might not be immediately apparent from visual inspection alone.
Laryngoscopy—examination of the larynx using either a flexible endoscope passed through the nose or a rigid endoscope placed at the back of the throat—provides direct visualization of the vocal folds. Standard laryngoscopy allows assessment of structural abnormalities, while stroboscopy (using a flashing light synchronized to vocal fold vibration) reveals subtle vibratory pattern changes that often precede visible tissue damage.
Additional assessments may include acoustic analysis measuring parameters like jitter and shimmer (variations in frequency and amplitude), aerodynamic studies evaluating airflow during phonation, or electromyography examining laryngeal muscle function. These objective measures complement the visual examination, creating a comprehensive understanding of vocal function beyond what can be observed through laryngoscopy alone.
Finding the Right Voice Specialist
Not all ENT specialists possess extensive experience with professional voice users' unique needs. Seek laryngologists who specialize in voice disorders and regularly work with singers, actors, teachers, or other voice professionals. These specialists understand the specific demands placed on professional voices and recognize the importance of preserving vocal nuance rather than simply restoring basic function.
Professional organizations like the Voice Foundation or the National Association of Teachers of Singing often maintain directories of voice-specialized physicians. University medical centers with otolaryngology departments frequently include voice specialists who combine clinical practice with research into voice disorders. When possible, seek recommendations from voice teachers, speech pathologists, or other voice professionals who understand the specialized care professional voices require.
Your Voice Can Last a Lifetime
With proper care, technique, and awareness, your voice can remain vibrant and functional throughout your entire life and career. Preventative measures prove far more effective than reactive treatments, creating sustainable vocal health that withstands professional demands without sacrificing expressive potential. By implementing these evidence-based strategies and seeking appropriate care when needed, you're investing in your instrument's longevity and reliability for decades to come. For additional resources on maintaining optimal vocal technique throughout your career, visit Ramsey Voice Studio.
Frequently Asked Questions
Many singers and professional voice users share common questions about vocal injuries. These answers reflect current understanding in voice science and laryngology, though individual cases may require personalized guidance from your voice care team.
Remember that while general principles apply broadly, your unique vocal mechanism, usage patterns, and medical history influence both injury susceptibility and appropriate treatment approaches.
Can vocal nodules heal without surgery?
Yes, most vocal nodules can heal without surgical intervention, particularly when addressed early. The primary treatment approach involves voice therapy with a qualified speech-language pathologist to correct technical issues causing excessive vocal fold collision forces. This therapy, combined with appropriate voice rest and lifestyle modifications, allows many nodules to resolve completely within 2-3 months. Surgical intervention typically becomes necessary only when nodules have hardened over time, making them resistant to conservative treatment approaches, or when professional demands require expedited resolution.
How long should I rest my voice after an injury?
Rest requirements vary significantly based on injury type and severity. Acute laryngitis typically requires 3-7 days of voice conservation, while vocal hemorrhage necessitates complete voice rest for 7-10 days minimum. For structural lesions like nodules or polyps, modified voice rest combined with appropriate therapy often continues for 4-6 weeks. Your ENT specialist and speech-language pathologist should provide specific guidelines tailored to your condition, with adjustments based on healing progress observed during follow-up evaluations.
Is whispering better than talking when recovering from vocal strain?
Whispering is not recommended during vocal recovery
Whispering creates excessive air pressure against partially closed vocal folds
This airflow pattern increases friction and potential tissue irritation
Whispering often involves increased laryngeal tension
Instead of whispering, use a soft, forward-focused speaking voice for essential communication during recovery periods. This gentle phonation maintains proper vocal fold closure patterns while reducing impact stress. If voice use must be severely limited, consider alternative communication methods like text-based options rather than relying on whispered speech.
Research from the Journal of Voice demonstrates that whispering actually increases supraglottic compression and laryngeal muscle tension compared to soft phonation, potentially extending recovery timelines for various vocal injuries.
When communication is necessary during healing, focus on using an easy, relaxed tone in the middle of your comfortable range, with proper breath support and minimal volume—just enough to be clearly heard by listeners at a close distance.
Can allergies cause vocal damage?
Allergies significantly impact vocal health through multiple mechanisms. The inflammatory response to allergens causes tissue swelling throughout the respiratory tract, including the vocal folds themselves. This swelling alters vocal fold mass and vibratory characteristics, requiring compensatory adjustments that may introduce harmful tension patterns. Additionally, post-nasal drip irritates laryngeal tissues and triggers throat clearing—a behavior particularly traumatic to vocal fold edges.
Seasonal allergies (pollen, grasses, etc.) create cyclical vocal challenges
Perennial allergies (dust, pet dander, etc.) can cause chronic vocal limitations
Food allergies or sensitivities may contribute to reflux issues affecting the larynx
Medication side effects (particularly antihistamine dryness) can worsen vocal symptoms
Effective allergy management through appropriate medical treatment often dramatically improves vocal function. Work with an allergist to identify specific triggers and develop a treatment approach that controls symptoms while minimizing side effects detrimental to vocal production. Non-drying antihistamines, nasal irrigation, and environmental modifications provide particular benefits for voice professionals dealing with allergic symptoms.
During acute allergy flares, increase hydration to counter medication-induced dryness, and consider temporarily reducing vocal demands until inflammatory responses subside. Steam inhalation provides particular benefit during these periods, helping to thin mucus secretions while providing direct moisture to irritated tissues.
What's the difference between vocal fatigue and vocal injury?
Vocal fatigue represents a temporary condition involving muscular tiredness, reduced coordination, and diminished vocal endurance—similar to how other muscles fatigue after extended use. This normal physiological response typically resolves with appropriate rest (usually 24-48 hours), proper hydration, and attention to vocal pacing. Most professional voice users occasionally experience vocal fatigue, particularly during periods of increased performance or speaking demands.
Vocal injury, in contrast, involves actual tissue damage that doesn't resolve with short-term rest alone. This damage may affect the vocal fold cover (microtrauma, hemorrhage), the structural layers (nodules, polyps, cysts), or the neuromuscular systems controlling laryngeal function. Recovery from true vocal injury typically requires extended treatment including voice therapy, medical intervention, or occasionally surgical approaches, with recovery timelines extending weeks or months rather than days.
The key distinction lies in recovery timeline and symptom progression. Fatigue improves with rest and typically doesn't worsen unless excessive voice use continues. Injury often progresses despite conservative measures, with symptoms persisting beyond normal recovery periods or intensifying over time. Additionally, vocal injuries frequently involve specific, consistent voice changes rather than the general tiredness associated with fatigue.
