Psychiatric symptoms in patients with viral encephalitis may manifest as delirium, mania, or problems with hallucinations, hallucinations, and hallucinations. The patient’s higher emotional activities may also be affected, for example, the patient may urinate and defecate anywhere, lose the sense of shame, and the patient’s sense of morality are all diminished to varying degrees. Patients may also experience personality changes, such as memory loss, depression, dislike of socializing with others or impatience, increased speech, suspiciousness, and selfishness, all of which are psychiatric symptoms that viral encephalitis may bring to patients. Viral encephalitis leads to mental symptoms mainly caused by damage to the temporal lobe, frontal lobe and hippocampus, which suggests that the degree of encephalitis is relatively severe and the prognosis is relatively poor, and should be treated actively.