Patients with encephalitis B can be cured with active treatment. Encephalitis B virus infection, patients may have headache, fever, nausea, fatigue, loss of appetite and other conditions, some patients may have cold symptoms. At this time, the patient needs to consult the doctor in time, check the blood routine and other tests, and if necessary, can do an electroencephalogram and cerebrospinal fluid puncture test. After the diagnosis of encephalitis B, active antiviral treatment is needed, and the use of proprietary Chinese medicines is considered to clear away heat and detoxify the toxins, which has a better therapeutic effect. If the patient has high fever and convulsions, the patient should be promptly treated with hypothermia and antitussive therapy. If the patient has high cranial pressure state or convulsive state, ice cap should be used timely to reduce the temperature of the brain and protect the brain. For patients with cerebral edema, mannitol and so on should be used timely to reduce intracranial pressure. If some patients are combined with bacterial infection, sensitive antibiotics can be added. If necessary, patients can do bacterial culture of cerebrospinal fluid as well as drug sensitivity test.