Encephalitis is a non-specific inflammation of the human brain cells, causing encephalitis for a variety of reasons, such as autoimmune, as well as bacteria, viruses, tuberculosis, fungi, etc. can lead to encephalitis, the diagnosis of encephalitis is as follows: 1. According to the characteristics of the medical history: the onset of the patient is relatively urgent, 3-5 days onset, there is fever, the patient has clinical features, such as impaired consciousness, babbling, convulsions, etc., these are These may be some of the more typical symptoms of encephalitis. In addition, some patients with encephalitis show a decline in memory, intelligence, and language dysfunction.2. Do tests: do lumbar puncture, routine biochemical examination of the cerebrospinal fluid, and sometimes specific antibodies to clarify which type of encephalitis is present, and also do electroencephalography and cranial MRI to see if the foci of encephalitis can be seen in the imaging.