Nasopharyngitis: Causes and Treatment

Nasopharyngitis is an acute inflammation of the mucous membranes of the nose and pharynx, most often viral in origin. This condition is commonly referred to as "the common cold" or "the common cold." Typical symptoms include a runny nose, nasal congestion, sneezing, a sore or scratchy throat, a mild cough, often a low-grade fever in children, and a rare fever in adults. The disease is generally mild and self-limiting, but can temporarily reduce productivity and quality of life. [1]

Most episodes are caused by rhinoviruses, but coronaviruses, respiratory syncytial virus, parainfluenza, adenovirus, and other pathogens are also possible. This explains the variety of symptoms and seasonal peaks in incidence. Nasopharyngitis should be distinguished from influenza, streptococcal pharyngitis, and other infections, as the diagnostic and treatment approaches differ. Correct recognition saves unnecessary testing and prevents the unnecessary prescription of antibiotics. [2]

Nasopharyngitis is transmitted by airborne droplets and contact. The risk of infection increases in closed spaces and crowded environments. Children are the primary reservoir of viruses and are more susceptible to the disease than adults, due to close contact in children's groups and the immaturity of their immune systems. Understanding these factors helps plan preventive measures in families and childcare facilities. [3]

Although the disease is predominantly benign, it can exacerbate chronic nasal and sinus conditions, trigger acute otitis media in children, and worsen asthma symptoms. Early notification of signs of complications and appropriate symptomatic therapy focused on comfort and safety are important for vulnerable groups. [4]

Code according to the International Classification of Diseases, 10th and 11th revisions

In the International Classification of Diseases, Tenth Revision, the basic code for nasopharyngitis is J00 "Acute nasopharyngitis," which is listed in parentheses as "common cold." The code belongs to the section "Acute upper respiratory tract infections" and is used to document typical episodes without specifying a specific pathogen. In practice, codes for associated conditions, such as acute sinusitis or otitis, are added as needed. [5]

In the International Classification of Diseases, Eleventh Revision, acute nasopharyngitis is classified in the "Acute Upper Respiratory Tract Infections" block and assigned the code CA00. The structure of the block emphasizes distinctions from acute sinusitis, acute pharyngitis, and acute tonsillitis, which is important for consistent reporting and research. Details of the pathogen and severity of the condition are included in the clinical description of the case. [6]

Table 1. Code correspondence

Situation	International Classification of Diseases, 10th revision	International Classification of Diseases, 11th revision
Acute nasopharyngitis, unspecified	J00	CA00
Acute nasopharyngitis with concomitant sinusitis	J00 + J01.x	CA00 + CA01
Acute nasopharyngitis with otitis in a child	J00 + H66.x	CA00 + corresponding middle ear code

Epidemiology

Nasopharyngitis is the most common human infection. Adults experience an average of 2 to 5 episodes per year, while preschool-age children experience 6 to 8 episodes per year, which is approximately four times more frequent. The incidence decreases with age as partial immunity to circulating serotypes develops. The socioeconomic burden is significant due to missed work and school leave. [7]

According to observations, children under 5 years of age experience respiratory infection symptoms in up to 38 percent of "person-weeks," while in adults and older children, the figure is approximately 20 percent. Seasonal peaks occur during cold months and periods of overcrowding. These characteristics must be taken into account when planning preventive measures and organizing children's groups. [8]

The rate of medical visits depends on the availability of self-care and the culture of using over-the-counter medications. Most episodes do not require a visit to the doctor and resolve on their own. However, the rate of complications is higher in young children and individuals with chronic respiratory diseases. [9]

Off-season outbreaks may be associated with pathogens other than rhinovirus, such as adenovirus or parainfluenza infection. During such periods, the risk of confusion with influenza is higher, emphasizing the importance of clinical differentiation and targeted testing as indicated. [10]

Table 2. Frequency of episodes

Group	Average number of episodes per year	Comment
Adults	2-5	Lower for those over 60 years of age
Preschool children	6-8	About 4 times more often than adults
Children under 5 years old	Up to 38% of person-weeks with symptoms	High proportion of persistent symptoms
Periods of crowding	Above average	Depends on the season

Reasons

The main pathogens are rhinoviruses, which have multiple serotypes and spread rapidly through contact and airborne droplets. Seasonal coronaviruses, respiratory syncytial virus, parainfluenza, and adenovirus are also significant. Mixed infections in children are common, which can prolong the course of symptoms. Identifying a specific virus rarely changes treatment strategies in outpatient practice. [11]

A bacterial origin for nasopharyngitis is unlikely. However, a viral infection may predispose to secondary bacterial complications, such as acute otitis media in children and acute bacterial sinusitis in adults. This requires monitoring the dynamics of symptoms and assessing for a "second wave" of worsening symptoms. Prophylactic antibiotics do not prevent such complications. [12]

Environmental factors play a significant role: dry air, tobacco smoke, and crowded conditions increase the risk of infection and the severity of symptoms. Children attending daycare centers have a higher incidence of episodes due to close contact and frequent touching of shared surfaces. Hygienic practices reduce the likelihood of transmission. [13]

In some cases, nasopharyngitis triggers an exacerbation of chronic nasal and sinus diseases, as well as bronchial asthma. This is due to increased mucosal inflammation and increased airway reactivity. In these patient groups, a pre-agreed self-care plan is advisable. [14]

Risk factors

The leading risk factors include childhood, contact in organized groups, cold weather, and inadequate hand hygiene. Families with several children are more likely to experience "serial" episodes than families without young children. These risk factors are largely modifiable through organizational measures. [15]

Smoking and passive exposure to tobacco smoke increase the frequency of episodes and the severity of symptoms. Dry indoor air reduces the efficiency of mucociliary clearance, facilitating the colonization of the mucous membrane by viruses. Humidification and ventilation reduce the risk. [16]

Stress, sleep deprivation, and intense physical activity without adequate recovery can temporarily reduce immune reactivity. Non-specific prophylaxis, focusing on sleep, nutrition, and moderate activity, helps reduce susceptibility. Although this does not completely protect against infection, the clinical course is often milder. [17]

Young children and patients with chronic respiratory diseases are at higher risk of complications. It is helpful for parents and patients to know the signs of otitis media, sinusitis, and severe cases so they can seek medical attention promptly. [18]

Pathogenesis

The virus enters the mucous membranes of the nose and throat, attaches to epithelial receptors, and triggers a local inflammatory response. Inflammatory mediators are released, vascular permeability increases, and edema and mucus hypersecretion develop. These processes cause a runny nose, congestion, and sneezing. Some patients develop a cough as a reflex response to the mucus dripping down the back of the throat. [19]

The immune system is rapidly activated: innate viral recognition mechanisms trigger the release of interferons and cytokines, which limits the pathogen's replication. Symptoms are caused not so much by the direct action of the virus as by the inflammatory response. This explains why some anti-inflammatory agents reduce the severity of symptoms, although they do not significantly affect the duration of the disease. [20]

The mucous membrane is normally cleared by mucociliary clearance. Dry air or exposure to smoke disrupts this mechanism, prolonging the virus's contact with the mucous membrane. Maintaining adequate humidity and drinking enough fluids help restore clearance. [21]

In children, narrow nasal passages and the relative immaturity of local immunity contribute to more severe clinical symptoms, including fever. In adults, fever occurs less frequently and is usually moderate. These age-related differences are important to consider when explaining the prognosis to the family. [22]

Symptoms

The most common symptoms include a runny nose, congestion, sneezing, a sore or scratchy throat, cough, fatigue, and headache. Children often experience a low-grade fever, while adults typically experience a normal temperature or a short-term rise to 37.5–38.0°C (99.5–100.4°F). Symptoms typically worsen over 1–3 days, then gradually subside. The average duration is 7–10 days. [23]

The sore throat is usually moderate and subsides as the runny nose subsides. The cough may persist for up to 2-3 weeks due to postnasal drip. Nasal discharge often changes color to yellow or green by the 3rd to 5th day. This is not a sign of a bacterial infection per se and is not an indication for antibiotics. An assessment of the overall progression is important. [24]

In young children, nasopharyngitis may be accompanied by irritability, sleep disturbances, and loss of appetite. In infants, difficulty breathing through the nose can interfere with feeding, so proper care can significantly improve well-being. If a child develops ear pain, otitis media should be considered. [25]

A high fever lasting more than 3 days, increasing facial and dental pain, purulent discharge lasting more than 10 days without improvement, severe ear pain, and a poor general condition should be considered. These signs may indicate a complication and require medical evaluation. [26]

Table 3. Common symptoms and duration guidelines

Symptom	Typical expression	Estimated duration
Runny nose and congestion	Moderate	7-10 days
Sore throat	Mild to moderate	2-5 days
Cough	Mild to moderate	Up to 2-3 weeks
Fever in children	Often low-grade fever	1-3 days

Classification, forms and stages

Clinicians conventionally distinguish between uncomplicated nasopharyngitis and complicated nasopharyngitis. Complications include acute otitis media, acute bacterial sinusitis, and exacerbation of bronchial asthma. This distinction helps guide monitoring and inform the patient of signs of deterioration. [27]

The phases typically include the onset of the disease with increasing symptoms, a plateau in severity, and a gradual decline. During the plateau phase, patients most often seek advice on symptomatic therapy. Care approaches are generally the same for all phases and are aimed at comfort and safe symptom relief. [28]

Depending on the suspected pathogen, rhinovirus, adenovirus, parainfluenza, and other variants are distinguished, but in outpatient practice, precise identification of the virus is usually not required. Exceptions include epidemiological issues and vulnerable patients, where the results may impact isolation measures. The decision is made by the physician. [29]

Nasopharyngitis is classified by age as either childhood or adult, reflecting differences in fever frequency, cough duration, and risk of complications. This classification helps to accurately interpret the prognosis and self-care guidelines. [30]

Complications and consequences

Acute otitis media is a common complication in children, especially those under 6 years of age. This is due to the peculiarities of the auditory tube and its tendency to accumulate secretions. Symptoms include ear pain, sleep disturbances, fever, and hearing loss. If suspected, a medical evaluation is required and, if confirmed, appropriate treatment is recommended. [31]

Acute bacterial sinusitis may develop as a "second wave" on days 7-10, with a return or worsening of facial pain, purulent discharge, fever, and nasal odor. Such cases require examination and discussion of antibacterial therapy according to current recommendations. Self-medication with antibacterial agents is unacceptable. [32]

In adults and children with asthma, nasopharyngitis can trigger an exacerbation of lower respiratory symptoms. Having a coordinated asthma action plan reduces the risk of emergency room visits. Patients should be advised to switch to an intensified treatment regimen at the first sign of a cold. [33]

Secondary bacterial throat infections, including streptococcal pharyngitis, are less common. The presence of prominent viral symptoms reduces the likelihood of a streptococcal origin and usually does not require testing. For typical streptococcal sore throat symptoms, a rapid test and, in children, a culture if the result is negative, are indicated. [34]

When to see a doctor

Seek immediate medical attention if you experience severe weakness, difficulty breathing, persistent high fever, signs of dehydration, ear pain in a child, or one-sided facial pain with purulent discharge for more than 10 days. These signs increase the risk of complications. The earlier the assessment, the easier the treatment. [35]

A routine consultation is indicated if symptoms do not subside by day 10, if the cough interferes with sleep for more than 2-3 weeks, if there are chronic respiratory diseases and concerns about self-care. The doctor will clarify the diagnosis, rule out other conditions, and adjust therapy. Self-medication with antibacterial drugs is unacceptable. [36]

For young children and at-risk patients, it is helpful to have written home monitoring instructions outlining "red flags" in advance. This reduces family anxiety and the number of unnecessary visits without increasing the risk of missing complications. [37]

In case of recurring episodes, especially during the season, it is useful to discuss organizational measures: air humidity, ventilation, hand hygiene, and temporary restrictions on contact during severe symptoms. These measures reduce the transmission of pathogens within the family and work environment. [38]

Diagnostics

The first step is a clinical assessment: complaints, duration, temperature, examination of the nasal cavity and pharynx, and evaluation of the child's ears. In the vast majority of cases, the diagnosis is clinical and does not require laboratory confirmation. It is important to rule out signs of complications and other diseases. [39]

The second step is deciding on testing. Routine virological tests are not required for typical cases. If streptococcal pharyngitis is suspected, a rapid test is indicated, and in children, if the result is negative, a culture is performed. This prevents unnecessary prescription of antibacterial drugs and helps initiate treatment quickly if the infection is confirmed. [40]

The third step is assessing risk factors for complications. In young children and in patients with chronic respiratory diseases, the threshold for re-evaluation is lower. If symptoms of acute sinusitis or otitis media are present, targeted diagnostics are performed according to specialized guidelines. Imaging is not indicated for uncomplicated colds. [41]

The fourth step is documentation and education. The patient is given written home care instructions, including criteria for return visits and safe symptomatic treatment regimens. This approach reduces anxiety and improves treatment satisfaction. [42]

Table 4. Minimal diagnostic algorithm

Stage	Action	Target
1	Clinical examination of the nose, throat, ears	Confirm the typical course
2	If streptococcus is suspected, a rapid test and/or culture	Rule out bacterial pharyngitis
3	Evaluation of complications	Decide on additional examinations
4	Written recommendations	Ensure safe self-care

Differential diagnosis

Influenza is characterized by a more abrupt onset, high fever, severe muscle aches, and often severe weakness within the first few hours. If influenza is suspected, the decision on testing and antiviral therapy is based on clinical criteria and risk factors. Distinguishing influenza from nasopharyngitis is important for prognosis and preventive measures. [43]

Streptococcal pharyngitis is characterized by a sore throat without a runny nose or cough, tender cervical lymph nodes, and plaque on the tonsils. A rapid test is indicated for the typical presentation, and in children, if the results are negative, a culture is performed. Confirmation requires antibacterial therapy, which distinguishes it from nasopharyngitis. [44]

Acute bacterial sinusitis should be suspected when there is a "second wave" of worsening symptoms after 7-10 days or persistent symptoms for more than 10 days without improvement, as well as severe facial pain and purulent discharge. Such cases require medical evaluation and possible antibiotic therapy. [45]

Allergic rhinitis can mimic nasopharyngitis but is characterized by itching, lacrimation, seasonality or exposure to an allergen, and the absence of fever. Treatment options in this case are different and include antiallergic medications and environmental control. [46]

Table 5. Differences in common conditions

Sign	Nasopharyngitis	Flu	Streptococcal pharyngitis	Allergic rhinitis
Start	Gradual	Sharp	Gradual	Variable
Fever	Often in children, rarely in adults	Often high	Possible	No
Runny nose and cough	Yes	Sometimes	None or minimally	Yes, with itching
The need for antibacterial therapy	No	No	Yes, upon confirmation	No

Treatment

The first principle is supportive care. Rest, as felt, and plenty of warm fluids, along with hydration and ventilation, are recommended. Nasal irrigation with isotonic solutions reduces the viscosity of mucus and facilitates breathing. This approach is safe for all ages and is the mainstay of therapy. [47]

Pain relief and discomfort reduction. To relieve a sore throat and headache, use paracetamol or ibuprofen in age-appropriate doses, based on the patient's pain rather than the temperature. Aspirin is contraindicated in children due to the risk of Reye's syndrome. Combining antipyretic medications unnecessarily is undesirable. [48]

Nasal decongestants. Short-term use of decongestant sprays may reduce congestion in adults, but should not exceed 3-5 days due to the risk of rhinitis medicamentosa. In children, non-pharmacological methods, including irrigation, are preferred. Intranasal corticosteroids are not routinely required for uncomplicated colds. [49]

Cough and postnasal drip. Warm drinks and honey in children over 1 year old reduce the frequency of nighttime coughs. Most over-the-counter syrups have limited evidence and should be used with caution and according to instructions. Humidifying the air reduces irritation of the back of the throat. [50]

Antibacterial drugs. Antibacterial drugs are not indicated for uncomplicated nasopharyngitis, as the condition is viral and self-limiting. Inappropriate prescription increases the risk of side effects and bacterial resistance to the drug. The exception is cases where a proven bacterial complication develops. [51]

Diagnosis and treatment of streptococcal pharyngitis when suspected. A rapid test is performed for typical symptoms, and in children, if the result is negative, a culture is performed. Confirmation dictates antibacterial therapy according to guidelines, which improves outcomes and reduces the risk of complications. Antibacterial drugs are not prescribed without confirmation. [52]

Herbal remedies and supplements. Vitamin C, echinacea, and zinc have been studied extensively, but their clinical benefits are limited and controversial. Use may be at the patient's discretion, taking safety into account, but should not replace evidence-based care. It is important to warn about the risk of side effects and interactions. [53]

Inhalation. Steam inhalation is not recommended due to the risk of burns and lack of proven effectiveness. Inhalation with humidified air at room temperature and the use of humidifiers are acceptable, provided the device is properly maintained. Inhaling hot steam is especially dangerous for children. [54]

Work and school. Returning to normal activities is possible if you feel well and have no fever. Hand hygiene, cough etiquette, and, if possible, wearing a mask during the first few days of severe symptoms are important to reduce virus transmission. Rest and a flexible schedule speed recovery. [55]

Symptom monitoring. If there is no improvement after 7-10 days or a "second wave" of worsening symptoms occurs, a re-evaluation for sinusitis, otitis media, or other complications is required. In children, the threshold for re-examination is lower due to the higher risk of complications. The doctor will adjust the treatment plan based on the new clinical picture. [56]

Table 6. What helps and what doesn't

Measure	It helps	Comment
Drinking, hydrating, saline nasal solutions	Yes	Care base
Paracetamol, ibuprofen	Yes	By suffering
Decongestant sprays in adults	Yes, briefly	No more than 3-5 days
Antibacterial drugs	No	Only in case of complications
Steam inhalation	No	Risk of burns

Prevention

Hand hygiene with soap and water or alcohol-based hand rubs reduces virus transmission. Ventilation and maintaining a comfortable humidity level reduce dry mucous membranes. Cough etiquette and the use of masks during the first days of severe symptoms reduce the spread of infection within the family and at work. These measures are especially effective during the flu season. [57]

Limiting contact during severe symptoms helps break the chain of transmission in groups. In childcare settings, group rules are important: regular handwashing, access to tissues, and training in sneezing etiquette. Parents can reduce the risk of a "family carousel" of episodes by separating towels and utensils during illness. [58]

Maintaining general health—sleep, nutrition, moderate physical activity—reduces susceptibility to infection. Quitting smoking and avoiding secondhand smoke reduce the frequency and severity of nasopharyngitis symptoms. These measures are beneficial year-round. [59]

Seasonal outbreaks require greater discipline in prevention. Understanding that children are the primary source of virus transmission in the family helps establish rational home rules without excessive restrictions and anxiety. [60]

Forecast

In most patients, nasopharyngitis resolves spontaneously within 7-10 days. Cough may persist for up to 2-3 weeks, especially with postnasal drip. The prognosis is favorable; complications develop in a small percentage of patients, most often in young children. Proper self-care and monitoring reduce the duration of severe symptoms and the risk of complications. [61]

Recurrent episodes during the season are normal and do not require in-depth investigations in the typical course of the disease. Reasons for more extensive diagnostics arise in cases of unusual or protracted course, frequent complications, and the presence of risk factors. In other cases, information and symptomatic support are sufficient. [62]

Having chronic respiratory diseases can worsen symptoms and prolong recovery. Individualized action plans and early use of coordinated measures can help avoid emergency care. It's helpful for asthma patients to keep written instructions handy. [63]

Family education and accessible reminders increase treatment satisfaction and reduce unnecessary visits. Patients are more likely to comply with recommendations when they understand the purpose of each intervention and the "red flags." This improves outcomes without unnecessary prescriptions. [64]

FAQ

Are tests necessary for a common cold?
No. In typical cases, the diagnosis is clinical. Tests are needed if streptococcal pharyngitis is suspected or if the course of the illness is atypical. [65]

Why does nasal discharge turn yellow or green?
This reflects the cellular composition of the secretion against the background of inflammation and does not automatically indicate a bacterial infection. The dynamics and duration of the infection need to be assessed. [66]

When are antibacterial drugs needed?
Only in cases of confirmed bacterial complications, such as streptococcal pharyngitis or acute bacterial sinusitis according to the criteria. Antibacterial drugs are not indicated for uncomplicated nasopharyngitis. [67]

How long does a cough last after a cold?
Up to 2-3 weeks, especially at night, due to mucus draining down the back of the throat. Fluids, hydration, and honey in children over 1 year old can help. [68]

How can you avoid infecting your family?
Frequent hand washing, separate towels and utensils during illness, ventilation, and wearing a mask during the first few days of severe symptoms. These simple measures significantly reduce the risk of transmission. [69]