The sequelae of meningitis in adults include mental retardation, hydrocephalus, limb movement disorders, immobility, paralysis, focal seizures, and some patients may also have sequelae such as hydrocephalus, deafness, blurred vision, visual impairment, and facial nerve palsy. The sequelae of meningitis are mainly related to the patient’s condition and may be left behind if the condition is severe and not treated promptly. There are four main types of meningitis, and most meningitis patients are treated promptly and generally have a good prognosis. However, cryptococcal meningitis has a poor prognosis and a high mortality rate, and tuberculous meningitis and septic meningitis are more difficult to treat and may have sequelae in some patients.