How to determine if a runny nose in children for a long time is rhinitis depends on the specific symptoms of the patient and should be analyzed for specific problems. If a child has a clear runny nose along with fever, cough, phlegm, chest tightness, shortness of breath, decreased appetite, nausea, vomiting and other symptoms, it may be an upper respiratory tract infection, usually a viral cold or a bacterial cold. This can be determined by routine blood tests and auscultation of the lungs. If children simply have a runny nose for more than 2 weeks without other symptoms, it can be considered rhinitis. It is recommended to go to a regular hospital for timely consultation, and examination of the nasal cavity can reveal symptoms such as enlarged turbinates, congestion of the nasal mucosa and increased secretions, which can be diagnosed as rhinitis and requires symptomatic treatment. The children with rhinitis should pay attention to avoid exposure to cold air, smoke and dust in their daily lives. Usually pay attention to exercise, enhance nutrition, prevent cold and cold.