Allergic rhinitis is the main cause of rhinitis in 3-year-olds, and there is usually no cure for it, but the symptoms can be relieved by cetirizine and fluticasone propionate nasal spray under the guidance of a doctor. Allergic rhinitis is clinically known as allergic rhinitis, which is usually characterized by morning sneezing, nasal congestion, runny nose, and so on, mainly watery nasal discharge. The symptoms can be relieved by nasal spray fluticasone propionate nasal spray, tretinoin nasal spray and other topical drugs containing glucocorticoid. In addition, you can add cetirizine and other drugs as prescribed by the doctor for anti-allergy treatment. If necessary, you can add nasal mucosal vasoconstrictor under the guidance of the doctor, such as ephedrine nasal drops and other nasal mucosal vasoconstriction. It is recommended that when a 3-year-old child develops symptoms of rhinitis, parents should take the child to the hospital in time to take effective medication to alleviate the symptoms under the guidance of the doctor.