Rhinitis in three-year-old babies is treated with antibiotics against infection if it is caused by an infection, most of them have rhinitis and sinusitis at the same time. If it is acute, choose antibiotic treatment for 14 days. If it is chronic, treat with antibiotics for about 12 weeks. The choice of antibiotics, first of all, if you are not allergic to cephalosporins, you can choose cephalosporins. If the cephalosporins are allergic, you can choose macrolides, like azithromycin, erythromycin, roxithromycin, etc. If the rhinitis is caused by allergy, choose anti-allergy drugs, the first choice is the second and third generation antihistamines, such as desloratadine, cetirizine and loratadine. It can also be treated with saline rinses of the nasal cavity or with the application of inhaled glucocorticoid nasal sprays. Some literature also reports that chewing a chewable tablet of montelukast sodium, also known as sulforaphane, at night is also effective in treating rhinitis.