There is no absolute most effective treatment for rhinitis in a 4-year-old child, and the cause of the disease needs to be identified and treated accordingly under the guidance of an ENT doctor. The main treatments include nasal irrigation, nasal decongestants, nasal glucocorticoids, antihistamines, mucolytic agents, antibiotics and so on. 1. Nasal irrigation: If the child can cooperate, saline can be used for nasal irrigation to improve the local microenvironment of the nasal cavity and reduce symptoms. 2. Nasal decongestants: 4-year-old children with rhinitis, if accompanied by severe, persistent nasal congestion, can be used under the guidance of a doctor, such as ephedrine nasal drops, note that the continuous use of such drugs not more than 7 days. Children need to use this drug with caution. 3. Nasal glucocorticoids: these drugs can reduce the inflammatory response of the nasal mucosa, with anti-inflammatory, anti-edema effect, commonly used drugs such as mometasone furoate nasal spray, need to be applied under the guidance of a doctor. 4. Antihistamines: For allergy-induced rhinitis in four-year-old children, antihistamines such as diclofenac tadalafil suspension can be used. 5. Antibiotic treatment: 4-year-old children rhinitis acute stage combined with bacterial infection can be systemic application of antibiotics, such as penicillin or cefadroxil, etc., but there is a history of allergy to the relevant drugs patients are prohibited. 4-year-old children suffering from rhinitis is recommended to consult a doctor in a timely manner to clarify the cause of the disease, standardized treatment under the guidance of the doctor, to avoid blind self-medication, so as not to cause adverse reactions.