Allergic rhinitis in children is a symptom that occurs when a child reacts to fur, mites that grow after the carpet is wet, cold air, dust, food (eggs, fish and shrimp), bacterial infections (such as reactions to bacteria on bacteria, toxins, etc.), or seasonal allergies (seasons with lots of pollen, etc.), where the nose is most likely to produce allergies, thus causing allergic rhinitis. Because of the serious air pollution, children have more seasonal allergic rhinitis; if they have it all year round, it is a perennial allergic rhinitis. Recurrent allergic rhinitis in children is prone to the following complications: bronchial asthma: the most common complication of allergic rhinitis, and the two often affect each other. Allergic rhinitis and bronchial asthma often coexist, with the former being a risk factor for asthma earlier than the latter. Therefore, the concept of “one airway, one disease” is often proposed. Allergic sinusitis: The mucous membrane of the sinus opening is edematous, resulting in nasal congestion and poor drainage, and the sinus cavity gradually develops negative pressure, when the patient has headache, if accompanied by infection, there may be allergic sinusitis. Secretory otitis media: The pharynx is involved and edema occurs, causing narrowing and obstruction of the pharyngeal opening, resulting in negative pressure in the tympanic chamber and exudative fluid production in the middle ear. Allergic pharyngitis: Patients may also develop throat itching, cough, or mild hoarseness, and in severe cases, mucous membrane edema of the epiglottis and vocal cords leading to dyspnea. Nasal polyps: Repeated nasal mucous membrane edema leads to the formation of nasal polyps, which obstruct the nasal cavity and cause obstruction of ventilation and require surgical removal to cure. Nasal bleeding: Itchy nose leads to excessive artificial pinching, making the nasal mucosa damaged and bleeding. Olfactory impairment: nasal mucosa edema or nasal infection injures the olfactory nerve. Insomnia: Long-term nasal congestion makes it more difficult for people to fall asleep, resulting in poor sleep causing poor mental performance and concentration. Breath-holding asphyxiation: The nasal cavity is regularly blocked with large amounts of liquid, and when a person falls asleep, the mouth is habitually closed, which can cause breath-holding and can seriously lead to asphyxiation.