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23 Nasal Itching andSneezing inChildren
315
Mechanical trauma caused by nose scratching can release inammatory mole­cules that further increase itching, creating a vicious circle [21].

23.3 Allergic Rhinitis

Allergic rhinitis is IgE-mediated inammation of the nasal mucosa that develops against specic allergens such as pollen, mold, feather, and house dust mites. Symptoms occur after the release of inammatory mediators. Clinical ndings such as runny nose, sneezing, nasal itching, and congestion are usually observed. Symptoms such as itching, redness, and swelling in the eyes are often observed together. Additional diseases such as rhinosinusitis, otitis, and asthma can some­times be observed [22].
Observation of symptoms for more than 1h a day for 2weeks and two or more additional symptoms suggests the diagnosis of allergic rhinitis in the child [23]. The mentioned symptoms are not observed with the same intensity in every patient. Some symptoms may seem more dominant than others.
Allergic rhinitis is the most common allergic disease in children [24]. Allergic rhinitis is observed in approximately 40 percent of children [25]. It was observed that the prevalence of allergic rhinitis in children in the United States increased from
13.4% in 1994 to 19.1% in 2003 [26]. In recent studies, the prevalence of allergic rhinitis in children was 13% [27]. Although the number of boys with allergic rhinitis was observed to be higher than girls at the ages of 6–7, it was observed that the number of girls was higher than boys at the ages of 13–14 [28]. Allergic rhinitis is the most common atopic disease under the age of 18 and is one of the leading chronic conditions [29]. Most patients develop symptoms of AR before age 20, and approximately half of these patients become symptomatic by age 6. If there is a his­tory of allergy in the family on both the mother’s and father’s side, symptoms usu­ally appear before adolescence. In the presence of a unilateral family history, symptoms are observed at older ages [30]. AR is rare in children younger than 2 years of age because it usually requires several years of allergen exposure to develop [31].
In children, sensitivity (presence of specic IgE) develops rst to allergens (dust mites) constantly in the air. It has been observed that sensitivity to pollens and other seasonal allergens develops before clinical complaints appear [32].
When symptoms of allergic rhinitis are evaluated in terms of time, they are clas­sied as intermittent if they occur after specic exposures, seasonal if they occur at certain times of the year, or perennial if the symptoms persist throughout the year [33]. Allergic rhinitis affects the upper respiratory tract and can be seasonal or year­round. In seasonal allergic rhinitis, symptoms usually occur in spring, summer, or fall and are often associated with pollen from trees, grass, and weeds. The number and type of pollen varies according to geographical regions. Even within a given area, weather patterns can cause annual changes in pollen count and the overall prevalence and severity of allergic rhinitis. Exposure to indoor and outdoor air pol­lutants, pet dander, cockroaches, dust mites, molds, and others must be considered
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in perennial allergic rhinitis. In some children, seasonal allergies may overlap and cause persistent symptoms [34]. Allergic rhinitis: Patients’ daily activities, sleep, and school routines are classied as mild, moderate, or severe (persistent or inter­mittent) according to the duration of symptoms [35].
It negatively affects the child’s quality of life and aggravates other allergic dis­eases, such as asthma [36]. At the same time, it disrupts the child’s quality of life by negatively affecting their social activities, school performance, sleep status, and psychosocial communication [37]. It has been reported that approximately two mil­lion school days are lost every year due to allergic rhinitis [38].
Young children suffer from acute infective rhinitis very frequently every year, making it difcult to distinguish the condition from allergic rhinitis. If the condition lasts longer than 2 weeks and there are other accompanying allergic symptoms, allergic rhinitis, such as nasal itching, should be considered [39].
Allergic rhinitis can occur at any age, but patients with allergic rhinitis have been reported to experience symptoms in childhood or young adulthood. Nasal itching is very useful in distinguishing allergic rhinitis from other forms of rhinitis. Children generally do not complain of nasal itching but show it through various nose-wiping methods [40]. In patients, an “allergic salute” can typically be observed, which is observed as a horizontal wrinkle on the nasal dorsum and occurs when the nose is rubbed upwards with the palm [41].
Evaluation of AR requires a detailed history, including physical examination and laboratory evaluation, in addition to questioning the patient’s environment and diet and the presence of allergies in the family. History and laboratory ndings provide clues to provoking factors. Symptoms such as sneezing, runny nose, nasal itching, congestion, and laboratory ndings of high IgE and sIgE antibodies and positive allergy skin test results indicate AR [42].

23.4 Non-allergic Rhinitis

The pathophysiology of networked conditions needs to be clearly dened. It is a situation where the true incidence of the disease is unknown. Current treatment is based on studies on adult individuals. There is no epidemiological data on the age at which non-allergic rhinitis occurs in children. In addition, the gender and age distri­bution of non-allergic rhinitis in the pediatric age group are unknown. In summary, only some aspects of pediatric non-allergic rhinitis in children have been explained, and its pathophysiology has yet to be fully explained. The lack of accurate diagnosis and appropriate treatment algorithms in managing the disease is noteworthy [43].
Non-allergic rhinitis is a disease that causes many clinical complaints with dif­ferent etiologies and pathophysiologies.
Diagnosing non-allergic rhinitis in children is challenging due to disagreements on the classication of different forms of non-allergic rhinitis and the need to eluci­date its pathophysiology. This problem is clinically diagnosed as non-allergic rhini­tis. The common denominator of the clinical conditions under this umbrella diagnosis is the absence of systemic allergic sensitivity. Non-allergic rhinitis causes
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infrequent symptoms. Sneezing and nasal itching are less common in non-allergic rhinitis than in allergic rhinitis but can be seen in the NARES subtype of non- allergic rhinitis.
Non-allergic rhinitis at age four was reported to be 8.1%, and the prevalence at age eight was reported to be 6.3% [32]. Another study reported that NAR was observed in 24.9% of 6600 children with rhinitis symptoms. It has been reported that NAR is more common than AR in children under the age of 6, that the diagnosis of AR increases with age, and that NAR decreases to 10–15% in older children [44].
Under the non-allergic umbrella, conditions such as infectious rhinitis, non­allergic rhinitis with eosinophilia, vasomotor rhinitis, atrophic rhinitis, rhinitis due to structural and mechanical factors, rhinitis medicamentosa, neoplasms, vasculitis, and granulomatous disorders are included.
Children complain of runny nose, nasal congestion, and sneezing in infectious rhinitis. The complaints usually disappear within the rst week, and the causative agent is mostly rhinoviruses [25].
In non-allergic rhinitis, where high eosinophilia is observed, the symptomatol­ogy of the disease and response to treatment is similar to allergic rhinitis. Still, unlike high IgE antibodies, high IgE antibodies are not observed [42].
Vasomotor rhinitis is characterized by the excessive response of the nasal mucosa to physical stimuli [42]. In vasomotor rhinitis, intermittent nasal congestion and runny nose are observed. A signicant increase in complaints is observed, espe­cially after exposure to air pollution and cold weather [45].
Atrophic rhinitis is a rare clinical condition that begins with puberty and results in slow and progressive atrophy of the nasal mucosa. It is typical for a crust to form in the nose and a foul odor [46].

23.5 Infectious Rhinitis

The most common form of non-allergic rhinitis in children is infectious rhinitis, which can be acute or chronic. Infectious rhinitis, commonly known as the common cold, is an acute and self-limiting disease. The most common cause is rhinoviruses. Children experience runny nose, nasal congestion, and sneezing, and the complaints usually disappear within the rst week [47, 48]. Around 36% of patients have sneez­ing on the rst day of the disease, and sneezing continues on the fth day in more than 35% [49].
Other symptoms, such as cough and sore throat, are more prominent in infective rhinitis. Acute bacterial rhinosinusitis is a situation in which complaints sometimes continue in viral rhinitis, and the sinuses are additionally included in the clinical picture. Acute symptomatic bacterial sinusitis develops in approximately 0.5–2% of viral upper respiratory tract infections in children [25].
Acute bacterial sinusitis presents similarly to an upper respiratory tract infection, with a runny nose, congestion, cough, and sometimes fever and headache. Edema and erythema are common in the nasal mucosa. Because sinusitis can develop as a complication of an upper respiratory tract infection, a prior upper respiratory tract
318
infection is commonly reported. Unlike an upper respiratory tract infection, patients with acute sinusitis experience signs and symptoms that worsen after 10days; puru­lent nasal discharge and halitosis are typical [50, 51].
In the presence of a chronic mucopurulent discharge, pathologies such as ade­noid hypertrophy, anatomical abnormalities, primary immunodeciency, primary ciliary dyskinesia, or cystic brosis should be considered [48].
Sometimes, allergic rhinitis and infectious rhinitis are observed together in chil­dren. In cases where these two conditions overlap, differential diagnosis becomes difcult. It has been observed that an exaggerated response to viral upper respira­tory tract infection is observed in atopic children [52]. Allergic rhinitis symptoms in children are often confused with infectious rhinitis symptoms. If symptoms last longer than 2weeks, a cause other than infection should be sought. When diagnosis cannot be made by history and physical examination, a nasal swab can be taken, which is helpful in differential diagnosis. Detection of more than 5% of eosinophils in the nasal swab suggests allergy, and neutrophil predominance suggests infec­tion [47].
N. Türe and F. Oğhan
23.6 NARES (Non-allergic Rhinitis
withEosinophilia Syndrome)
In Non-allergic Rhinitis with Eosinophilia Syndrome (NARES), which is evaluated under the table of non-allergic rhinitis, the dominant symptoms are continuous sneezing and excessive nasal discharge. Sometimes, it is accompanied by nasal con­gestion, itching, and a decreased sense of smell. The presence of increased eosino­phils in the nasal swab, useful in differential diagnosis, is noteworthy. Failure to monitor systemic sensitivity helps differentiate it from allergic rhinitis. The skin prick test is negative. Specic IgE is not monitored. Its pathophysiology needs to be clearly understood. The hypothesized view is that nasal neural dysfunction causes symptoms [53].
23.6.1 Vasomotor Rhinitis
Vasomotor rhinitis is a diagnosis of exclusion. Common symptoms are primar­ily nasal congestion and runny nose but can also include nasal itching and sneezing. The pathophysiology of vasomotor rhinitis is not well understood but is believed to be due to autonomic dysregulation resulting in an imbalance in sympathetic and parasympathetic activity. In vasomotor rhinitis, symptoms begin suddenly and disappear quickly when the triggering factor is removed. The allergy test is negative. Symptoms may change depending on weather changes [54, 55].
Finally, it should not be forgotten that nonallergic, noninfectious rhinitis condi­tions occur due to exposure to irritants, hormonal dysfunction, and specic drugs. This should be considered in the differential diagnosis.
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23.7 Evaluation

The ear, nose, and throat physical examination begins after the pediatric patient complaining of nasal itching and sneezing states their rst complaint. Evaluation should always start by taking a comprehensive medical history. During the interro­gation, attention should be paid to what the patient does not say and specic situa­tions such as mouth breathing, dry mouth, and speaking. Detecting an allergic or infectious cause in children may be challenging, mainly when rhinitis is frequently observed. Therefore, other distinctive physical examination ndings of allergic rhi­nitis should be questioned.
One of the characteristically noticeable ndings of allergic rhinitis in children is the horizontal scar observed in the nose tip area. This is an important examination nding that is observed as a result of repeating the movement called allergic salute, which is performed by lifting the tip of the nose upwards with the palm of the hand, for at least 2years to increase nasal breathing and reduce the feeling of itching. With advancing age and adolescence, this movement can be observed as facial grimacing [56, 57].
Notably, ndings in neighboring organs should be noticed. Venous pooling occurs around the eyes secondary to inammation in the nasal mucosa. The pig­mentation observed on the lower eyelid skin due to hemosiderin accumulated under the skin during ponding is called allergic glitter. Venous pooling causes constant muscle spasms in the lower eyelid. Spasm in the Müller muscle causes small scars called Dennie-Morgan lines on the lower eyelid skin. Long and silky eyelashes sometimes accompany allergic rhinitis complaints [56].
Anterior rhinoscopy provides valuable information about the septum and lateral nasal wall. In allergic rhinitis, the nasal mucosa and turbinates may appear normal but are usually edematous and pale. At the same time, the color of the discharge in the nasal passage is helpful in distinguishing its uidity. In contrast, the color of the nasal mucosa in patients with non-allergic rhinitis is usually standard, and acute viral rhinosinusitis has a red appearance. In current practice, every otolaryngologist successfully applies exible nasopharyngoscopy and endoscope, which allows the anterior and posterior nasal structures to be distinguished more specically than anterior rhinoscopy. Although nasal endoscope application is complex in young children, its benet in clarifying nasal pathologies is excellent [58].
When the palate feels itchy, children may click while moving their tongue towards the palate to relieve this itching feeling [59]. Depending on the timing of allergen exposure, symptoms may be present year-round or seasonally [56].
Non-allergic rhinitis symptoms usually occur throughout the year. However, sea­sonal exacerbations can occur due to changes in humidity, temperature, and pres­sure. Differential diagnosis becomes difcult since these complaints overlap with allergic rhinitis complaints in autumn and spring. The absence of eye and palate symptoms is important in non-allergic rhinitis [60].
In non-allergic rhinitis, nasal secretions are generally normal except for edema­tous erythematous conchas. Nasal secretions can be observed as mucoid or transpar­ent [61].
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Both nasal passages should be examined, and attention should be paid to the color and consistency of the discharge detected in the nasal passage, the degree of edema in the mucosa, and the presence of turbinate hypertrophy. Examination of the oropharynx should also be included, and a postnasal drip should be noted. In addi­tion, an ear examination should be performed, and the color and mobility of the tympanic membrane and the presence of uid behind the membrane should be noted.
Perinatal infections such as Chlamydia can present as persistent rhinitis. In ado­lescence, inquiries about the onset of puberty may be helpful, as hormonal changes may cause nasal congestion [62].
It is essential to determine whether the patient is also sexually active. In some cases, syphilis may occur with chronic rhinitis [63]. All patients’ previous sinus surgeries should be questioned.
Assessment of the chronicity of rhinitis is critical. Intermittent nasal congestion is more closely associated with self-limiting rhinovirus infections. Chronic persis­tent nasal congestion may indicate more complicated conditions such as adenoid hypertrophy or immobile cilia syndrome. Investigating all possible etiological fac­tors is very important to make the correct diagnosis. Inquiry regarding exposure to potential triggers commonly associated with nasal hyperreactivity, such as odors, drafts, cold air, temperature changes, fatigue, stress, and spicy foods, will help the clinician conrm the etiology of the patient’s chronic rhinitis. Reviewing past medi­cation use and effectiveness may also help conrm the diagnosis [43].
Finally, nasal itching and sneezing symptoms are not sensitive or specic enough to distinguish between bacterial sinusitis and allergic or viral rhinitis. This often leaves patients in situations where the two conditions overlap.

23.8 Diagnosis

It is essential to question nose itching and other symptoms accompanying sneezing. Use diagnostic tools according to etiology. Allergic rhinitis, infectious rhinitis, and non-aller­gic, non-infectious rhinitis should be considered in the differential diagnosis of pediatric patients complaining of nasal itching and sneezing. Although almost all patients who applied to health institutions with rhinitis complaints were diagnosed with allergic rhi­nitis, it is worth emphasizing that in studies conducted, allergy could not be identied as the etiology in 40–64% of these patients. For this reason, after a preliminary diagnosis of rhinitis is made in patients presenting with sneezing, diagnostic tests should be used appropriately, and differential diagnosis should be made carefully.
Diagnosing allergic rhinitis in children is made by specic allergic complaints in the history and diagnostic tests.
In the preliminary diagnosis, allergy tests are performed for this purpose in the pediatric patient in whom allergy is suspected. Allergy tests to conrm the initial diagnosis include a skin prick test and serum-specic IgE.Skin prick test is fre­quently preferred in children because it is easy to apply, gives results quickly, can be used in ofce conditions, and has reasonable specicity and sensitivity. Serum­specic IgE is as sensitive as skin prick tests, which show the patient’s complaints are due to allergies. Specic IgE is safely preferred, especially in patients who do
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not have a systemic reaction, have had a systemic reaction before, and have skin diseases where objective data must be provided [25].
When an infection is suspected, complete blood count, white cell count, and C-reactive protein (CRP) are helpful in differential diagnosis [1].
Nasal cytology is not a frequently used diagnostic method because it cannot be standardized, its results are highly variable, and its results have different sensitivity and specicity. Despite this, eosinophils in the nasal swab indicate inammation and can help predict corticosteroid response [1].
Radiology for rhinitis is not routinely recommended. However, if rhinosinusitis or nasal polyposis is suspected, especially if it does not respond to medical treat­ment, a Computed Tomography scan is helpful. However, remember that radiation exposure in pediatric patients should be kept as low as possible [1].
Allergic rhinitis is often accompanied by eye symptoms (itchy and watery eyes), and many patients have a positive family history of allergic rhinitis [64].
Sinusitis is primarily a clinical diagnosis; imaging is used to conrm it and eval­uate its complications when necessary. A CT scan compatible with sinusitis shows clouding, opacity, thickening of the mucosal interface, and air-uid levels in the affected sinus [65].
Patients with non-allergic rhinitis often complain of nasal congestion and rhinor­rhea, but they also complain less about sneezing and itching [66].
Blind cultures of the nasopharynx in children with rhinitis have little clinical value because pathogenic bacteria are present in the normal ora in 92% of asymp­tomatic healthy children [25].
A careful history and physical examination are the most effective diagnostic maneuvers in identifying allergic rhinitis in children. The distinction is sometimes tricky as allergic and non-allergic rhinitis often cannot be distinguished based on symptoms and require different management strategies and pharmacological treat­ments. Clinicians should perform specic diagnostic tests on pediatric patients when indicated.

23.9 Treatment

The aim of treating Allergic Rhinitis, which is considered the main culprit in nasal itching and sneezing and comes to mind rst in the differential diagnosis in chil­dren, is to control the patients’ symptoms, increase their quality of life and school success, and prevent the development of complications.
The best treatment for nasal itching and sneezing due to allergic rhinitis is allergy avoidance. Medical treatment is resorted to in pediatric patients who cannot achieve sufcient success despite protection and rearrangement of the environment. Immunotherapy is helpful in cases that fail medical treatment. Treatment includes environmental control, allergen avoidance, pharmacotherapy, and allergen-specic immunotherapy [33].
Informing families about avoiding allergen exposure is very important in manag­ing pediatric patients. Although it does not seem possible to avoid allergens despite all restrictions, it has been reported that this method reduces allergen load [25].
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Simple practices such as not being outdoors during pollen periods, using lters in motor vehicles, using glasses and hats outdoors, and washing hands and face are recommended [67].
To reduce contact exposure in managing allergic rhinitis caused by house dust mites, the environment should be ventilated frequently, dust should be removed often, items should be washed at temperatures higher than 55°C, and carpets with less pile should be preferred. All the methods listed have been reported to relieve the symptoms of allergic rhinitis caused by house dust mites. Oral antihistamines and nasal steroids are both effective on sneezing and nasal itching.

23.10 Prognosis

In allergic rhinitis, where nasal itching and sneezing are frequently observed, the positive impact on the child’s quality of life is excellent when compliance with the treatment is ensured. It is expected to produce specic drugs based on genetic sequences that target the cells, nerves, and cytokines involved in nasal itching and sneezing and treat these two conditions as a systemic process.

23.11 Conclusion

Every child who complains of nasal itching and sneezing should undergo a detailed history and physical examination, and other accompanying symptoms should be questioned. Further assessment and treatment should be performed for differential diagnosis of diseases in which nasal itching and sneezing occur together. Despite the high prevalence of allergic rhinitis in the pediatric population, this disease is often overlooked or undertreated.
Untreated allergic rhinitis impairs the child’s and his parents’ quality of life. Accurate and timely diagnosis of allergic rhinitis in children depends on awareness of the symptoms and signs of the disease and comorbidities, including asthma, sinusitis, and otitis media. Rhinitis complaints can be reduced, especially with simple mea­sures, and they contribute positively to quality of life and school performance.
Physicians should differentially diagnose nasal itching and sneezing in children and perform specic diagnostic tests when necessary. Intranasal corticosteroids and non-sedating antihistamines are successfully used in the treatment.

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