Bacterial meningitis mainly refers to a serious infectious disease of the central nervous system caused by pathogenic bacteria passing the blood-brain barrier and attacking the meninges, which can occur in adults and children. The diagnosis is based on the following points: 1, clinical manifestations, headache, chills, fever, vomiting, confusion, even coma, and abnormal mental behavior; 2, physical examination, positive meningeal irritation signs such as cervical tonicity, Kebb’s sign, and a high percentage of neutrophils in blood routine, suggesting infection; 3, lumbar puncture, cerebrospinal fluid examination, with a purulent or cloudy appearance, high pressure and high cell count, but predominantly neutrophils 4, cerebrospinal fluid culture, pathogenic bacteria culture, has a confirmatory significance, also feasible head CT or magnetic resonance enhancement scan, the examination suggests that there is reinforcement of the meninges, electroencephalogram examination suggests that there is a significant increase in slow waves.