Is brain edema terrible? How is the mortality rate?

Brain edema is caused by multiple intracerebral and extracerebral diseases, abnormal weight gain of brain tissue cells or extracellular fluids, resulting in increased brain volume. Normal brain edema can be divided into primary brain edema and secondary brain edema, as well as localized brain edema and diffuse brain edema, etc. At present, clinical treatment for brain edema is mainly to control blood pressure, limit water intake, reduce intracranial hypertension, and suggest appropriate use of adrenocortical hormone. Brain edema will show cerebral hernia, consciousness disorders and coma, brain edema mortality is not high, but more sequelae.