Vocal Fatigue

Vocal fatigue is tiredness, effort and decline of voice quality that develops with use and improves with rest. It is a symptom of muscle tension dysphonia, vocal overload, laryngopharyngeal reflux or neurological disease.

• It is common in teachers, singers, preachers and telephone workers.
• Dehydration, stress, poor sleep, reflux and hormonal change contribute.
• It may be the first sign of an underlying vocal fold or neuromuscular disorder.

Voice that is clear in the morning and worsens through the day, throat aching, tightness, effort in speaking, reduced pitch range and volume, and hoarseness after prolonged speech.

• Examination may show neck muscle tension, a posterior glottic gap or no abnormality.
• Differential diagnosis: vocal fold nodules, muscle tension dysphonia, laryngopharyngeal reflux, thyroid disease, myasthenia gravis, Parkinson disease, vocal fold paresis, menopausal voice change, depression, spasmodic dysphonia.
• Complications: chronic dysphonia, vocal fold lesions, occupational loss, anxiety.

Clinical assessment with laryngoscopy.

• Voice history and vocal load, with hydration, reflux and medication review.
• Flexible laryngoscopy with stroboscopy when available.
• Thyroid function test; acetylcholine receptor antibodies or repetitive nerve stimulation if there is fatigable weakness in other muscles.

Reduce vocal load and retrain the voice.

• Supportive: scheduled voice rest during the day, hydration with 2 litres of water daily, steam, vocal hygiene, amplification, avoid whispering and shouting, adequate sleep, stress management, stop smoking.
• Pharmacological: omeprazole 20 mg twice daily for 8 weeks if reflux features; treat allergic rhinitis with intranasal steroid; correct hypothyroidism with levothyroxine; avoid drying drugs such as antihistamines where possible.
• Procedures: voice therapy with semi occluded vocal tract exercises, straw phonation and resonant voice training over 6 to 8 sessions; manual laryngeal massage.
• Special groups: older adults, evaluate for presbylarynx and neurological disease; pregnancy, hydration and rest; singers, coaching and warm up routines.
• Red flags: hoarseness beyond 4 weeks, weakness in other muscles, dysphagia, weight loss, neck mass, smoker with persistent change.
• Follow-up: review at 6 to 8 weeks; refer for laryngoscopy if there is no improvement.