Viral meningitis is an infectious disease, which is an acute inflammation of the meninges caused by various viral infections. It is a benign, self-limiting disease with no sequelae and a good prognosis. The common causative organisms of viral meningitis are enteroviruses, followed by mumps virus, herpes simplex virus and adenovirus. Common pathological manifestations are diffuse meningeal thickening, brain tissue edema, widening of the gyrus, and shallowing of the sulcus. Inflammatory cell infiltration of the meninges is seen microscopically, and inflammatory cells may also be present in the ventricles and choroid plexus of the fourth ventricle. Viral meningitis has an acute or subacute onset in summer and fall. Patients often have symptoms of systemic toxicity of viral infection, such as fever, photophobia, myalgia, nausea, vomiting, loss of appetite, diarrhea, and general malaise, with body temperature not exceeding 40°C. The older the patient, the more severe the disease. Patients often have severe headache, mostly in the frontal or retro-orbital area, as well as nausea and vomiting, and may have signs of meningeal irritation. Some patients have symptoms of specific viral infections, such as abdominal pain, diarrhea, sore throat, rash, myocarditis, mumps, etc. Ancillary examinations are usually no positive findings in cranial CT, mild to moderate increase in cerebrospinal fluid examination pressure, mild increase in white blood cells, mild increase in protein content, and normal sugar and chloride content. The main principles of treatment are symptomatic treatment, supportive treatment and prevention of complications, and antiviral drugs may be given as appropriate. The above is an introduction to viral meningitis, and patients are advised to treat it under the guidance of a doctor.