Cerebrospinal fluid rhinorrhea is a disruption of the hypopituitarism barrier that causes cerebrospinal fluid to flow through the arachnoid, dura mater and skull base into the nasal cavity or sinuses and out of the nostrils or nasopharynx exit. In patients with nasal leakage of cerebrospinal fluid, a We report a case of a boy who had intermittent and regular fever after surgery, which was treated with We report a case of a boy who had intermittent and regular fever after surgery, which was treated with oral medication but was not effective, accompanied by headache and diplopia, which resolved when the cerebrospinal fluid flowed through the nose. Clinical practice, we often see febrile children and often report spontaneous or post-traumatic cerebrospinal fluid rhinorrhoea, which can allow As a paediatrician, the clinical signs are often atypical and nowadays children often suffer from allergic rhinorrhoea, which can be caused by the presence of bacteria, viruses or atypical pathogens to retrograde into the skull and cause meningitis. Nowadays children often suffer from allergic rhinitis with similar features to cerebrospinal fluid rhinorrhoea, which requires prompt clinical The clinical signs are often atypical and nowadays children often suffer from allergic rhinitis with similar features to cerebrospinal fluid rhinorrhoea, which requires prompt clinical judgment and treatment.
 Our case shows that in children with regular fever and a regular flow of clear fluid from the nasal cavity, we need to be alert for this disease and differentiate it from diseases such as allergic rhinitis.