Initial assessment and airway safety
When a patient presents with hoarseness or voice change, this represents a common clinical scenario, particularly in primary care. In most cases, dysphonia results from benign and self-limiting causes, such as recent respiratory infections or vocal overload. Nevertheless, this complaint should not be underestimated, as it may be the initial manifestation of significant structural laryngeal disease, including malignancy.
The first step is to assess airway safety. The presence of stridor, dyspnea, difficulty swallowing secretions or a recent history of laryngeal trauma should raise suspicion of significant airway compromise. In these cases, the priority is stabilisation and urgent referral, before any aetiological investigation.
Red flags and referral
In the absence of emergency features, the next step focuses on identifying red flags that may suggest structural laryngeal disease. Persistence of dysphonia for more than four weeks is, in itself, an important warning criterion. Other clinical features should also be considered, such as progression of symptoms, hemoptysis, dysphagia, odynophagia, referred otalgia or unexplained weight loss.
Findings such as cervical lymphadenopathy or a palpable neck mass further increase suspicion. The clinical context should also be taken into account, particularly significant smoking history, excessive alcohol consumption, previous head and neck radiotherapy, recent intubation, neck surgery or immunosuppression. In the presence of any of these features, priority ENT referral and laryngoscopy are indicated, laryngoscopy being the examination of choice for laryngeal assessment.
Most common benign causes
When there are no red flags, the approach should focus on identifying the most common and benign causes of dysphonia. Most acute cases are associated with viral upper respiratory tract infections, characterised by recent onset, concomitant symptoms such as cough or rhinorrhea and a self-limiting course.
Another common cause is vocal overuse, particularly in professionals who use their voice intensively. In these patients, dysphonia often appears after periods of intense vocal effort and may be associated with vocal fatigue or the need to clear the throat.
Reflux and associated rhinitis
Laryngopharyngeal reflux is another common cause, although it is often underdiagnosed. In these cases, dysphonia may coexist with a foreign-body sensation in the throat, chronic throat clearing, irritative cough or retrosternal burning. Anti-reflux therapy should not be started indiscriminately in the absence of suggestive symptoms and should be reserved for compatible clinical contexts.
Rhinitis with postnasal drip may also contribute to laryngeal irritation and voice change, particularly when associated with chronic cough and a sensation of secretions in the oropharynx.
Iatrogenic causes
Among iatrogenic causes, dysphonia associated with inhaled corticosteroids is particularly relevant and is relatively common in patients with asthma or COPD. In these cases, voice change results from local drug deposition and myopathic effects on the vocal folds. Management mainly involves optimising inhaler technique, using a spacer and reinforcing mouth rinsing after inhalation, often avoiding the need to discontinue therapy.
General measures
Regardless of the suspected aetiology, general measures should be implemented in all patients. Vocal hygiene is the cornerstone of treatment and includes relative voice rest, adequate hydration, avoidance of throat clearing and reduced exposure to irritants, such as tobacco. These simple measures are often sufficient to allow symptom resolution in benign conditions.
Reassessment and follow-up
Clinical reassessment is central throughout the process. Most benign dysphonias improve progressively over two to four weeks. Persistence of symptoms beyond this period, despite appropriate measures, should prompt diagnostic reconsideration and referral for specialist assessment, ensuring exclusion of structural disease.
Summary of the approach
In summary, this algorithm follows a logical and progressive sequence: first ensuring airway safety, identifying red flags early, recognising the most common benign causes and guiding intervention in a targeted and proportionate way. This structure turns a common complaint into an opportunity for rigorous clinical assessment, ensuring safety, therapeutic effectiveness and appropriate use of healthcare resources.
