Bronchitis in children: symptoms and treatment

Bronchitis in children is an inflammation of the bronchial wall, most often caused by viruses and characterized by coughing, sometimes wheezing, chest discomfort, and a mild fever. For most children, acute bronchitis is a self-limited condition and resolves without antibiotics: antibiotics do not speed recovery unless there are signs of a bacterial infection or pneumonia. The primary tasks of the doctor and parents are to assess the severity, rule out any red flags, explain how to relieve symptoms, and when to seek medical attention again. [1]

In some children, coughs can be protracted. If a wet cough persists for more than 4 weeks, it's time to consider "prolonged bacterial bronchitis"—a common cause of chronic wet cough in preschoolers that responds well to a properly selected course of antibiotic treatment. It's important to distinguish it from bronchial asthma, whooping cough, and other causes. The inappropriate "habit" of prescribing antibiotics for every acute cough in children increases the risk of bacterial resistance and subsequent unnecessary prescriptions. [2]

Chronic bronchitis, as it is commonly understood in adults (a daily cough with sputum production for at least three months a year for two consecutive years), is rare in children and requires investigation for underlying causes, including cystic fibrosis, congenital anomalies, bronchiectasis, immune deficiencies, and exposure to tobacco smoke. This condition always warrants a referral to a pulmonologist. [3]

It's important to be precise when classifying diseases: "bronchitis" includes acute bronchitis, chronic forms, and special variants in children (for example, bronchiolitis is a separate nosology). This determines the International Classification of Diseases codes and treatment algorithms. [4]

Code according to ICD-10 and ICD-11

In the International Classification of Diseases, Tenth Revision, the main category for acute bronchitis is J20, with specific pathogens (e.g., J20.5 - acute bronchitis due to respiratory syncytial virus), as well as J20.9 - unspecified acute bronchitis. For unspecified bronchitis without signs of acuteness, J40 is used. The choice of a specific code depends on the clinical presentation and the confirmed pathogen (if known). [5]

In the International Classification of Diseases, Eleventh Revision, acute bronchitis is coded in block CA42 with variants depending on the causative agent (e.g., CA42.2 – caused by respiratory syncytial virus) and CA42.Z – acute bronchitis, unspecified. It is important not to confuse it with acute bronchiolitis (CA41) and pneumonia (CA40), which belong to other categories. [6]

Table 1. ICD-10 and ICD-11 codes for bronchitis in children

Class	Heading	Transcript
ICD-10	J20.0-J20.8	Acute bronchitis with indication of the pathogen (mycoplasma, Haemophilus influenzae, streptococcus, coxsackievirus, parainfluenza, respiratory syncytial virus, etc.) [7]
ICD-10	J20.9	Acute bronchitis, unspecified [8]
ICD-10	J40	Bronchitis, not specified as acute or chronic [9]
ICD-11	CA42.0-CA42.4, CA42.5	Acute bronchitis with indication of the pathogen (streptococcus, rhinovirus, respiratory syncytial virus, parainfluenza, Haemophilus influenzae, coxsackievirus) [10]
ICD-11	CA42.Y	Other specified acute bronchitis [11]
ICD-11	CA42.Z	Acute bronchitis, unspecified [12]

Epidemiology

Acute bronchitis is one of the most common reasons for seeking medical attention for coughs. According to review sources and reference books, an annual episode of acute bronchitis occurs in approximately 6% of children, with seasonal increases occurring during the cold season. Despite its viral nature, antibacterial medications are still overprescribed.

Bronchiolitis, often mistakenly called "bronchitis," is a particular problem in children: during the respiratory syncytial virus (RSV) epidemic season, the number of hospitalizations increases sharply, as demonstrated by the 2022-2023 season. Distinguishing between bronchiolitis and bronchitis is important because the treatment approaches differ. [14]

Long-term bacterial bronchitis is recognized as one of the most common causes of chronic wet cough in children. The proportion of such cases among those seeking treatment for chronic cough varies from 16% to 54% or higher, according to data from different centers. This explains why a lingering wet cough requires targeted treatment rather than "eternal" cough syrup. [15]

The incidence of wheezing in preschoolers varies by age and gender, with higher rates in boys under 18 months. These findings highlight the role of viruses, age, and anatomical features of the respiratory tract in the clinical picture. [16]

Table 2. Epidemiological landmarks

Indicator	Rating / fact
Proportion of children with at least one episode of acute bronchitis per year	about 6% (according to review data)
The proportion of long-term bacterial bronchitis among visits for chronic wet cough	16-54% and higher, according to data from different centers [18]
Peak hospitalizations for bronchiolitis (for differentiation)	significant increase in the 2022-2023 season, peaking in November 2022 [19]
Higher risk of wheezing	boys under 18 months (about 4.7 per 1000 per year) [20]

Reasons

The leading cause of acute bronchitis in children is viral infections, including rhinoviruses, parainfluenza viruses, respiratory syncytial virus, coronaviruses, and other seasonal pathogens. Viruses trigger inflammation and mucus hypersecretion, which causes coughing. Antibiotics are ineffective against viruses and are therefore not indicated in typical cases. [21]

Bacterial agents are much less common in acute bronchitis in children. However, in children with prolonged bacterial bronchitis, bronchial secretion cultures often reveal Haemophilus influenzae, Moraxella, pneumococcus, and sometimes staphylococcus; in some cases, mixed infections are also found. This explains the effectiveness of antibacterial therapy specifically in prolonged, rather than typical, "cold" bronchitis. [22]

Chronic triggers such as passive smoking, air pollution, chronic rhinitis, adenoiditis, and gastroesophageal reflux can lead to prolonged bronchial inflammation. Correcting these triggers reduces the frequency and severity of coughing episodes. [23]

Certain “special forms” in children, such as bronchiolitis, are essentially lesions of the small bronchioles and have different management regimens; it is important not to confuse these diagnoses and not to generalize data on bronchiolitis to “classic” school-age bronchitis. [24]

Risk factors

Risk factors include attending daycare during the infectious season, exposure to adults who smoke, an atopic background, chronic upper respiratory tract infections, prematurity, and low birth weight. These factors increase the likelihood of coughing episodes and prolonged illness. [25]

Air pollution, inhalation of fine particles, mold in the home, overcrowding, and low vaccination rates against influenza and pneumococcus are associated with more severe respiratory infections. Working in the home environment actually reduces the risk. [26]

The risk of developing long-term bacterial bronchitis is higher in preschoolers with a chronic wet cough without other warning signs, especially if episodes recur more than twice a year. A proper treatment plan is essential: confirm the wet nature of the cough, rule out other causes, and, if necessary, conduct a trial course of treatment. [27]

Airway hyperreactivity and asthma can coexist with bronchitis, but are not the same. If wheezing, nocturnal symptoms, and a response to a bronchodilator are present, the physician considers the possibility of asthma and adjusts the approach. [28]

Table 3. Risk factors and what to do about them

Factor	What increases	What helps?
Passive smoking	Frequency and severity of coughing episodes	Completely tobacco-free home/car [29]
Visiting kindergarten during the season	Contact with viruses	Hand hygiene, vaccination schedule, ventilation
Mold/Dampness	Long-term inflammation of the respiratory tract	Repair, dampness removal and ventilation
Chronic rhinitis/adenoiditis	Postnasal drip, cough	Treatment of ENT pathology
Low vaccination	Severe respiratory infections	Influenza and pneumococcal vaccinations as indicated

Pathogenesis

In acute viral bronchitis, viruses damage the bronchial epithelium and trigger an inflammatory cascade. Mucus production increases, ciliary activity decreases, and coughing develops as a protective mechanism. Inflammation is usually limited to the large and medium bronchi, so gas exchange is minimally affected, and the main complaints are coughing and discomfort. [30]

With prolonged bacterial bronchitis, persistent neutrophilic inflammation develops, leading to bacterial colonization of the bronchial tree. This maintains mucus production and a wet cough for weeks. A properly prescribed course of antibacterial medication eliminates the bacterial load and breaks the vicious cycle. Ignoring the problem increases the risk of bronchiectasis. [31]

Any factors that impair mucus clearance (passive smoking, air pollution, concomitant ENT problems) promote inflammation and delay recovery. Therefore, treatment is always twofold: symptomatic care plus environmental management. [32]

It is important not to confuse the pathogenesis of bronchitis and bronchiolitis: in bronchiolitis, the main target is the bronchioles, respiratory failure develops more quickly in infants, and the management strategy is different (respiratory support, oxygen, nutritional control). [33]

Symptoms

The leading symptom is a cough. Initially dry, it then becomes wet and may be accompanied by discomfort or a scratchy sensation behind the breastbone. The temperature is usually low-grade fever and short-lived. In partially healthy children, the general appearance of suffering is moderate. [34]

Wheezing and short-term shortness of breath are possible with bronchial hyperreactivity, especially in preschoolers. This does not necessarily indicate bronchial asthma, but it does prompt the physician to evaluate the response to bronchodilator inhalation and a family history of atopy. [35]

If the cough is wet and persists for more than 4 weeks, especially without a break at night, prolonged bacterial bronchitis should be considered. Typically, the child feels well otherwise, but the cough persists. Proper diagnosis allows you to avoid unnecessary diagnostics and return to a normal lifestyle. [36]

Warning signs that require immediate examination include shortness of breath at rest, intercostal retractions, cyanosis, high and persistent fever, severe weakness, refusal to drink, pain in the side or abdomen, and noisy breathing at a distance. These signs are more likely to indicate pneumonia, bronchiolitis, or other serious conditions. [37]

Table 4. Symptoms and probable causes

Symptom/sign	Most likely	What to do
Cough for up to 3 weeks, moderate fever	Acute viral bronchitis	Symptomatic care, observation [38]
Wet cough >4 weeks	Long-term bacterial bronchitis	Diagnostic algorithm, trial course of therapy [39]
High fever, flank pain, tachypnea	Pneumonia	Examination, auscultation, radiography if necessary, antibiotics as indicated
Shortness of breath in infants, apnea, wheezing	Bronchiolitis	Urgent assessment, supportive care [40]

Classification, forms and stages

Based on cough duration, bronchitis is classified as acute (usually up to 3 weeks), subacute (3-8 weeks), and chronic (more than 8 weeks). In pediatrics, prolonged bacterial bronchitis is conveniently distinguished as a clinical syndrome characterized by a wet cough lasting more than 4 weeks that responds to antibacterial treatment. [41]

The etiology specifies the suspected or proven pathogen for acute bronchitis (viral, bacterial, mixed), as well as the environmental factors involved. For coding, this is reflected in the choice of a specific code. [42]

The severity of the disease is determined by the presence of respiratory failure, intoxication, complications, and the need for hospitalization. Most children with acute bronchitis do not require hospitalization. [43]

For chronic forms in children, a broader differential approach is used: bronchiectasis, cystic fibrosis, primary ciliary dyskinesia, immune deficiencies, and asthma are excluded. [44]

Complications and consequences

Complications are rare in typical acute bronchitis. The main risks are related to improper management: unnecessary antibiotics lead to resistance, side effects, and perpetuate the family's "antibiotic expectation." [45]

Untreated, prolonged bacterial bronchitis can lead to bronchiectasis—an irreversible widening of the bronchi associated with chronic infections and decreased quality of life. Early recognition and treatment reduce this risk. [46]

In children with underlying bronchial hyperreactivity, frequent episodes of bronchitis exacerbate symptoms and lead to missed school days, and impair sleep and physical activity. These are indirect costs that must also be considered when planning treatment. [47]

Upper respiratory tract complications include sinusitis and otitis media, especially in children. Prevention involves an adequate regimen, environmental control, and regular vaccinations. [48]

When to see a doctor

If the cough persists for more than 3 weeks, if there is a fever for more than 3 days, shortness of breath, noisy breathing, chest pain, blood in the sputum, refusal to drink, or signs of dehydration, an examination is mandatory. In infants, the threshold for seeking medical attention is lower. [49]

Repeated episodes of wheezing, night awakenings, activity limitation, or frequent use of a quick-relief inhaler are reasons to check for hyperreactivity and consider asthma.[50]

A wet cough lasting more than 4 weeks requires evaluation for chronic bacterial bronchitis and other causes of chronic cough using pediatric algorithms. Self-medication with syrups is ineffective in such situations. [51]

If signs of a severe respiratory infection appear (retractions between the ribs, cyanosis, severe lethargy), you should immediately seek emergency care. [52]

Diagnostics

The first step is a detailed history: cough duration, character (dry or wet), nocturnal symptoms, relationship to exercise, exposure to infections, passive smoking, vaccinations, episodes of wheezing, and "red flags." A physical examination assesses breathing, auscultation, and signs of respiratory failure. In typical uncomplicated acute bronchitis, no further testing is required. [53]

The second step is identifying situations that require testing: suspected pneumonia (high fever, tachypnea, localized wheezing, flank pain), a persistent wet cough lasting more than 4 weeks, suspected foreign body obstruction, asthma, or chronic pathology. In these cases, chest X-rays, spirometry in children undergoing training, pulse oximetry, and sometimes sputum culture or posterior pharyngeal swabs are used. [54]

The third step is the algorithm for prolonged bacterial bronchitis: confirmation of a wet cough, the absence of warning signs, the prescription of an adequate course of antibacterial medication in terms of duration and dose, followed by an assessment of the effect. If there is no response, a review of the diagnosis and an in-depth examination (for example, a CT scan if bronchiectasis is suspected) are performed. [55]

The fourth step is an assessment of environmental factors and concomitant conditions (allergic rhinitis, adenoiditis, gastroesophageal reflux disease, obesity) that support the cough and require parallel correction. [56]

Table 5. When and what studies are needed

Situation	Study	Comment
Typical acute bronchitis	Not required	History and examination, education and observation are sufficient [57]
Suspected pneumonia	Chest X-ray, pulse oximetry	Antibiotic decision based on clinic and guidelines
Chronic wet cough >4 weeks	Trial course of therapy for prolonged bacterial bronchitis, culture and imaging if necessary	Evaluation of response after 2-4 weeks [58]
Suspected asthma	Spirometry in children undergoing education	Bronchodilator test, symptom diary
Warning signs	Individually	Exclusion of foreign bodies, congenital anomalies, bronchiectasis

Differential diagnosis

The main "masks" of bronchitis in children are bronchiolitis in infants, pneumonia, bronchial asthma, whooping cough, and sinusitis with postnasal drip. Differential diagnosis is based on age, duration of cough, breathing pattern, temperature, auscultatory findings, and response to therapy. [59]

Bronchiolitis is more common in children under two years of age: severe shortness of breath, wheezing, retractions, decreased oxygen saturation, and risk of apnea. Pneumonia is accompanied by high fever, tachypnea, localized crepitations, and flank pain. Asthma presents with wheezing episodes, nocturnal symptoms, and improvement with bronchodilator and anti-inflammatory therapy. Whooping cough is a paroxysmal cough with wheezing and vomiting. [60]

Chronic bacterial bronchitis—a wet cough without systemic intoxication—responds well to a properly selected antibiotic. Lack of response prompts the search for bronchiectasis and other chronic lung diseases. [61]

Table 6. How to distinguish the main conditions

Sign	Acute bronchitis	Bronchiolitis	Pneumonia	Asthma	Whooping cough
Age of peaks	Preschoolers/schoolchildren	Up to 2 years	Any	Any	Any
Temperature	Moderate/short	May be	Often high	Usually no	Not necessarily
Dyspnea	Small	Often significant	Significant	During an attack	Rarely
Auscultation	Wheezing of various sizes	Remote whistles	Local crepitations	Whistling, prolonged exhalation	Purely
Response to antibiotics	No	No	Yes	No	No
Key	Self-restraint	Breathing support	Antibiotic as indicated	Anti-inflammatory therapy	Macrolide according to indications

Treatment

First and foremost: antibiotics are not recommended for typical acute bronchitis in children. The disease is caused by viruses, and antibacterial drugs do not speed recovery, but rather increase the risk of side effects and bacterial resistance. Parents should explain in advance why a "germ pill" is not helpful, but potentially harmful. [62]

Symptomatic care includes rest, adequate hydration, fever control, and pain relief if needed. Cough medications with multiple ingredients have not shown convincing benefit in children and may have side effects; treatment should be individualized and short-term, especially in young children, where many medications are simply contraindicated. Humidification and warm drinks are simple and safe methods. [63]

Bronchodilators (eg, salbutamol) and inhaled steroids are not recommended for acute bronchitis without underlying airway disease. The exception is children with known bronchial hyperreactivity or established asthma, where short-term use may relieve wheezing. This is clearly reflected in the guidelines for the treatment of acute cough. [64]

Mucolytics (e.g., acetylcysteine, carbocysteine) are not recommended for the treatment of acute cough associated with upper and lower respiratory tract infections. Their benefit in children has not been proven, and the risk of side effects and interactions is not zero. [65]

Inhaling saline solution through a nebulizer can help relieve the feeling of sticky mucus, but this is more of a supportive measure than a treatment for inflammation. Steam inhalation is not recommended for young children due to the risk of burning. At home, ventilation and humidification are more important. [66]

If bacterial bronchitis is chronic (wet cough lasting more than 4 weeks, no red flags), a properly selected course of antibiotics is indicated. The first line is amoxicillin-clavulanate at an age-dependent dose for 2 weeks; if the response is incomplete, the course is extended for another 2 weeks. Some guidelines discuss courses of up to 4-6 weeks under observation. The choice of drug and duration is the prerogative of the pediatrician/pulmonologist. [67]

In cases of recurrent, prolonged bacterial bronchitis (more than two episodes per year), a search for predisposing factors and, possibly, lung imaging to rule out bronchiectasis is required. Between attacks, breathing exercises and training in airway clearance techniques from specialists are helpful. [68]

Antiviral drugs are not routinely used for acute bronchitis in children. Exceptions are possible in cases of laboratory-confirmed influenza in children from high-risk groups, where antiviral therapy is prescribed according to specific recommendations from infectious disease specialists. [69]

Herbal medicine, cupping, mustard plasters, and other "traditional" methods have not been proven effective in treating bronchitis and may be unsafe for children. Parents should explain the difference between the feeling of "doing something" and actual benefits; it's better to focus on proven measures. [70]

Post-illness monitoring is important if the cough persists or new symptoms appear. After an episode of prolonged bacterial bronchitis, a reassessment is recommended after 2-4 weeks to ensure the cough has resolved and to discuss prevention and an action plan for the next episode. This reduces the risk of chronicity. [71]

Table 7. What is and is not recommended for acute bronchitis in children (according to NICE/CDC)

Intervention	Recommendation
Antibiotics for typical acute bronchitis	Do not administer unless there is evidence of bacterial infection or pneumonia [72]
Bronchodilator/inhaled steroid in the absence of asthma	Do not offer routinely [73]
Mucolytics	Not recommended [74]
Pain relief/antipyretics, fluids, rest	Allowed based on symptoms [75]
Training, red flags, re-contact	Necessarily

Prevention

The most effective prevention is reducing exposure to viruses and smoking: hand washing, ventilation, and avoiding smoking in the home and car. During the respiratory virus season, it helps to follow social distancing rules and avoid sending sick children to daycare. [76]

Vaccination according to the national schedule, including influenza vaccination for children at risk, reduces the incidence and severity of respiratory infections. In some cases, pneumococcal vaccination is discussed according to the schedule and the child's health status. [77]

Control of the home environment (wet cleaning, mold removal, adequate ventilation, maintaining humidity) and treatment of chronic ENT conditions reduce persistent cough and the frequency of exacerbations. [78]

Family education is an important part of prevention: understanding when to pay attention, when to simply observe, and why antibiotics are not a “magic bullet” helps avoid unnecessary medications and complications. [79]

Forecast

With typical acute bronchitis, the prognosis is favorable: the cough usually resolves within 2-3 weeks. In some children, a residual cough can persist for up to 4 weeks—this is not a cause for panic if the child feels well and there are no red flags. [80]

With prolonged bacterial bronchitis, the prognosis is also good with timely diagnosis and a full course of treatment: the wet cough disappears, and the child returns to normal activity. Relapses require an investigation of the cause and preventive measures. [81]

An unfavorable scenario is associated with undertreated or unrecognized conditions (bronchiectasis, cystic fibrosis, immune deficiencies). Regular monitoring by a pediatrician and specialized specialists can prevent complications. [82]

Good communication with the family and adherence to guidelines reduce repeat visits and unnecessary appointments, improving the quality of life for the child and parents. [83]

Frequently Asked Questions (FAQ)

1. Is antibiotics necessary for acute bronchitis in a child?
In the vast majority of cases, no. Acute bronchitis in children is most often caused by viruses. Antibiotics do not shorten the duration of symptoms or prevent complications, but they increase the risk of side effects and bacterial resistance. [84]

2. How long can a cough with bronchitis last?
Usually up to 2-3 weeks. If the cough is wet and lasts more than 4 weeks, discuss prolonged bacterial bronchitis with your pediatrician; it is treated differently. [85]

3. Will cough syrups help?
In children, the proven benefits of many "syrups" are limited, and there are risks. The key is rest, fluids, education, and medications strictly according to the indications and age. [86]

4. Should I use inhalations?
Inhalations with saline may subjectively facilitate mucus removal. Bronchodilators and inhaled steroids are not routinely prescribed in the absence of asthma. [87]

5. What is "prolonged bacterial bronchitis"?
This is a syndrome in children with a wet cough lasting more than 4 weeks without other alarming symptoms, which resolves with a properly selected and sufficiently long course of antibiotic therapy. It is important to distinguish it from asthma and bronchiectasis. [88]