It is unlikely for a child at the age of 13 months to have seasonal allergies, as these typically develop around the age of 4. Allergies require exposure to the allergen for several years before the immune system detects it and reacts excessively, leading to allergies. It is recommended to look for other causes for the symptoms. To help with nasal congestion, regularly cleaning the nose with a saline solution can be beneficial. Protecting the child's eyes from wind with a hat or a stroller net may also help, as wind, sun, or airborne particles can be irritating. If considering an antihistamine, options like cetirizine (Reactine) or desloratadine (Aerius) could be tried, as they are approved for use in children aged 2 and older in Canada. It is important to consult with a pharmacist for proper dosing and product selection. These products are generally non-sedating, but about 10% of patients may experience drowsiness with Reactine.