Meningitis is an acute or chronic inflammatory disease caused by pathogenic microorganisms invading the meninges of the central nervous system. The common manifestations of meningitis are fever, headache and vomiting. Depending on the causative microorganism, common meningitis include viral meningitis, purulent meningitis, tuberculous meningitis and cryptococcal meningitis, with the following symptoms: 1. Viral meningitis is an infectious disease. Viral meningitis mostly has systemic toxic symptoms of viral infection, such as fever, photophobia, myalgia, nausea and vomiting; purulent meningitis Tuberculous meningitis has symptoms of tuberculosis toxemia, such as low fever, night sweats, loss of appetite, and mental inactivity. Early manifestations of increased intracranial pressure, meningitis lesions can lead to diffuse meningeal thickening and diffuse exudative inflammation, gradually appearing brain tissue edema; cryptococcal meningitis can also form granulomas or small cysts, resulting in increased cranial pressure and meningeal irritation signs. The main symptoms include headache, vomiting, optic papillar edema, cervical ankylosis, and positive Gram’s sign and Bruch’s sign. Brain parenchymal damage, such as limb paralysis, ataxia, and persistent epilepsy, may occur as the disease progresses if not treated in time after the onset of the disease. Some inflammatory exudates can also stimulate cranial nerves and cause brain nerve damage. Treatment of meningitis requires early and aggressive efforts to select adequate and sensitive medications for the causative organisms after diagnosis, as well as to prevent and treat complications.