Patient: My son was born prematurely by caesarean section on June 19, 2013, one month premature, discharged from the hospital on the 24th, came home with a fever of 38 degrees on the night of the 26th, did not eat milk, then sent to the provincial children’s hospital, now the cerebrospinal fluid white blood cell count is 880, the doctor said it is viral meningitis, now the temperature is 37.5 degrees, is this situation serious? Will it cause dementia in the future? The causative agent of intracranial infections in young children is difficult to define at the early stage of the disease and needs to be clarified in conjunction with other manifestations. It is necessary to repeatedly check the cerebrospinal fluid and observe the effect of treatment, and also pay attention to the presence of complications. Active treatment is needed to avoid sequelae.