Infant rhinitis is mainly caused by allergies, viruses, bacterial infections and other factors. 1. Allergic rhinitis: when the infant’s nasal cavity comes into contact with allergic substances, the more common allergens include pollen, animal fur, etc. When the allergens enter the nasal cavity, they will cause rapid-type metamorphosis, resulting in sneezing and other rhinitis symptoms. 2. Infectious rhinitis: rhinitis caused by upper respiratory tract infections, mainly caused by bacteria or viruses in the nasal mucous membrane inflammation, can also be secondary to bacterial infections, common causative organisms such as Haemophilus, anaerobic bacteria and so on. It often causes fever, sneezing and other symptoms in infants. When infants are in discomfort, they should go to the hospital immediately and receive standardized treatment after the diagnosis is clear.