Cerebral edema is determined by factors such as the severity of the primary disease or the timeliness of treatment to return to normal. Some patients can return to normal. 1. The primary disease is mild and the treatment is timely: if the cerebral edema is caused by mild lead poisoning, mild cerebral hemorrhage, mild cerebral infarction, or viral encephalitis, timely and targeted treatment after the onset of the disease can restore the patient to the normal state after treatment. 2. Severe primary disease or untimely treatment: if the cerebral edema is caused by intracranial malignant tumor, cryptococcal meningitis, large cerebral infarction, severe cerebral hemorrhage, or when the targeted treatment is not carried out in time after the onset of the cerebral edema, the prognosis of the patients will be poorer. There may be different degrees of sequelae such as headache, dizziness, limb movement disorder, aphasia, etc. after treatment. If the patient has cerebral edema, it is recommended to go to the hospital for examination at the first time and actively cooperate with the doctor for treatment, so as not to miss the condition.