Introduction

Laryngitis is an inflammation of the larynx (sometimes called the voice box), which is essential for speaking, breathing, and swallowing. Particularly during seasonal respiratory disease outbreaks, viral infections are a common cause of laryngitis in teenagers. Speaking difficulties, hoarseness, and sore throat are common symptoms of this disorder that can interfere with everyday tasks, including social interactions at school. Teenagers are especially susceptible to upper respiratory tract virus infections because they often interact in crowded settings, such as classrooms and sporting events. It is crucial to understand how viral infections affect the development of laryngitis, so we can prevent it effectively, treat it promptly, and reduce the discomfort it causes.¹

Understanding laryngitis

The general definition of laryngitis is infection of the larynx, especially of the voice cords. It is frequently classified into acute and chronic types.

Acute laryngitis

It is far more common in teenagers, typically caused by viral infections, and goes away in one to two weeks.²

Chronic laryngitis

It is more frequently associated with long-term exposure to irritants like smoking, pollution, or vocal strain.

Due to thickening and inflammation of the vocal cords, hoarseness of voice is the main symptom of laryngitis. Common symptoms include dry cough, throat pain, throat discomfort, and fever.

Teenagers with these symptoms may find it difficult to participate in social events, school, and everyday conversations. While the majority of cases are minor and resolve on their own, repeated or severe laryngitis may be a sign of underlying risk factors that need to be evaluated by a doctor.³

Common viral causes in teenagers

Viral infections are the primary cause of acute laryngitis in teenagers. Before moving on to the larynx, where they cause inflammation of the vocal cords, these viruses usually infect the upper respiratory system.

The most common viral pathogens are:

• Rhinovirus: It causes modest but widespread inflammation, including the larynx. This virus causes the common cold
• Parainfluenza virus: Children and teens are frequently infected with this virus, which can cause severe laryngitis
• Adenovirus: It is often responsible for conjunctivitis and pharyngitis. It is also known to cause laryngitis
• Respiratory Syncytial Virus (RSV): It is responsible for causing laryngitis in teenagers. However, laryngitis caused by this virus in young children is very severe
• Epstein-Barr Virus (EBV): Hoarseness and pharyngolaryngitis are two symptoms of Epstein-Barr Virus (EBV)-related infectious mononucleosis, which is less prevalent yet noticeable in teenagers

Teenagers are more susceptible to laryngitis during seasonal peaks of respiratory disease because these illnesses are common in school and community settings.⁴

Pathophysiology of disease

The onset of viral laryngitis is caused by respiratory viruses entering the upper airway, which triggers a chain of interrelated pathophysiological events.

Viral entry and colonisation

Viruses enter the body through direct contact with infected surfaces or inhalation of respiratory droplets, first infecting the mucosa of the nose and throat before moving onto the larynx.

Inflammatory immune response

The virus activates the body's immune system after it has established itself. The laryngeal tissues become locally inflamed due to the production of cytokines and other mediators by white blood cells.

Oedema and vascular changes

Increased blood flow and capillary permeability cause the vocal cords to expand (oedema), which alters their natural vibration and can lead to hoarseness or even temporary voice loss.

Excess mucus production

In addition to irritating the vocal cords, viral inflammation also produces excessive mucus that causes coughing and throat clearing.

Secondary irritation from coughing

Prolonged coughing and frequent gargling increase stress on the vocal cords, which further prolongs the inflammation.

                                                      Viral Entry  

                                                            ↓  

                                  Infection of the Upper Respiratory Tract  

                                           (Throat, nose, sinuses)  

                                                            ↓  

                                     Immune Response Triggered  

                                    (White blood cells → Inflammation)  

                                                            ↓  

                                          Inflammation of the Larynx  

                                     (Swollen vocal cords, redness)  

                                                            ↓  

                                      Mucus Production & Irritation  

                                                            ↓  

                                  Hoarseness, Voice Loss, Sore Throat  

                                                            ↓  

                                      Repeated Coughing/Irritation  

                                        (Can prolong inflammation)⁵

Risk factors for teenagers

Several factors make teenagers more susceptible to viral laryngitis compared to other age groups:

High exposure in communal settings

Schools, sports activities and social gatherings increase the likelihood of close contact and viral transmission.

Developing immune responses

Although stronger than in early childhood, teenage immune systems are still adapting, sometimes making them more vulnerable to seasonal viral surges.

Seasonal variability

Viral infections, particularly influenza and parainfluenza, peak during colder months, when indoor crowding further facilitates spread.

Vocal strain

Teenagers often engage in shouting, cheering, or singing, which can strain the vocal cords and worsen viral inflammation.

Environmental and lifestyle factors

Poor hydration, exposure to secondhand smoke, and inadequate rest may reduce laryngeal resilience and prolong recovery.⁶

Clinical presentation and diagnosis

Common clinical features

1. Hoarseness or voice loss
2. Sore throat and throat irritation
3. Dry cough
4. Low-grade fever and malaise
5. Throat discomfort

Diagnosis

Clinical evaluation

History and physical examination are used to diagnose the majority of teenagers.

Physical findings

Direct visualisation of the larynx is not often necessary; however, the throat may seem red or inflamed.

Laryngoscopy

Used to examine enlarged or inflamed vocal cords directly; reserved for unusual, severe, or chronic conditions.

Exclusion of additional conditions

Differential diagnosis for bacterial pharyngitis is considered if symptoms, such as allergic responses and vocal cord nodules, do not improve after a couple of weeks.

Management and recovery

Teenagers with viral laryngitis are often treated with supportive care because the illness typically resolves on its own. The primary objectives are to reduce discomfort, encourage recovery, and avoid complications.

Supportive measures

• Voice rest: Limiting talking, shouting, or singing to reduce strain on inflamed vocal cords
• Adequate hydration: Drinking warm fluids helps keep the throat moist and soothes irritation
• Humidified air: Using a humidifier or inhaling steam can ease dryness and reduce throat discomfort
• Symptomatic relief: Over-the-counter analgesics such as acetaminophen or ibuprofen can be used to relieve pain and fever
• Throat lozenges and warm saltwater gargles: They provide temporary relief from irritation and dryness

Medical considerations

Antibiotics: NOT INDICATED, as viruses are the main reason; misuse may lead to resistance.

Corticosteroids: Occasionally prescribed in severe cases, though rarely required in teenagers.

Follow-up: Advised that if symptoms persist beyond two weeks, rule out other causes such as bacterial infection or vocal cord pathology.

Recovery outlook

Within 7 to 14 days, the majority of adolescents recover completely, with symptoms progressively improving as the inflammation reduces.¹

Prevention

General preventive strategies

• Hand hygiene: Regular handwashing with soap and water
• Respiratory etiquette: Covering the mouth and nose when coughing or sneezing and avoiding close contact with infected individuals
• Vaccination: Annual influenza vaccination can significantly lower the risk of one of the most common viral causes of laryngitis

Lifestyle and environmental measures

• Hydration and healthy diet: Adequate fluid intake and a balanced diet support immune function and keep the throat moist
• Avoiding vocal strain: Encouraging teenagers to moderate shouting, singing, or prolonged loud talking, particularly during viral illnesses
• Smoke-free environment: Avoiding exposure to tobacco smoke, which irritates the larynx and increases vulnerability to infections
• Adequate rest: Ensuring sufficient sleep helps strengthen the immune defence against viral pathogens⁷

Summary

Laryngitis is the inflammation and irritation of the larynx, also known as the voice box. A significant exposure of teenagers to respiratory pathogens in public settings makes viral infections the primary cause of acute laryngitis in this age group. Through viral invasion, immune activation, and vocal cord swelling, these infections cause larynx inflammation, leading to common symptoms such as coughing, sore throat, and hoarseness. Proper management and prevention are critical; even though the illness usually resolves on its own, it can temporarily affect daily communication and everyday activities. While preventive measures such as immunisation, proper sanitation, and lifestyle changes can lower the likelihood of recurrence, supportive care—which includes voice rest, hydration, and symptomatic relief—remains the cornerstone of treatment. Promoting recovery and long-term voice health in teenagers requires an understanding of the interaction between viral infections and laryngeal inflammation.