The most common form of autoimmune encephalitis is anti-NMDA receptor encephalitis, which has the highest clinical incidence and is more common clinically, with a possible relapse rate of 12% to 31% and an average relapse period of about five months. Symptoms of immune encephalitis are usually milder after a relapse than after the previous one, but there are no definitive data on the recurrence rate of other types of autoimmune encephalitis. The prognosis for autoimmune encephalitis is relatively good with early standardized immunosuppressive treatment, but some encephalitis may still have a certain relapse rate due to the presence of tumors and other factors. Autoimmune encephalitis is an encephalitis mediated by autoimmune mechanisms. Autoimmune encephalitis is divided into various types depending on the antibodies and the presence of tumors.