If a two-year-old child has allergic rhinitis, first clarify whether the child’s symptoms are very serious. If the child often sneezes continuously, has incessant nasal congestion, snores and wakes up when sleeping, he or she needs to apply anti-allergy medicine orally, commonly used is loratadine syrup or loratadine granules, the specific dosage of the medicine needs to be used again under the guidance of the doctor to avoid overdose. At the same time, you can consider applying a layer of blocker evenly on the mucosal surface of the child’s nasal cavity. The common clinical practice is Tess pollen blocker, which can effectively prevent the child’s nasal mucosa from contact with allergens. It is recommended to let children eat more vegetables and fruits, which can strengthen the resistance ability. The nasal cavity can also be properly sprayed with physiological sea saline, which can effectively reduce the degree of sensitivity of the child’s nasal mucosa.