The survival time of adult hydrocephalus varies from person to person and is mainly related to the rate of development and severity of hydrocephalus in patients. Hydrocephalus is a series of neurological disorders caused by excessive accumulation of cerebrospinal fluid in the skull due to impaired intracranial cerebrospinal fluid absorption and secretion circulation. If hydrocephalus is acute and severe, coma, paralysis, as well as significant nausea, vomiting, and increased intracranial pressure may occur, and the patient’s survival period may be very short, even less than one month. If the hydrocephalus is milder and the patient develops hydrocephalic adaptive changes, he or she may survive for a very long time. However, most hydrocephalus is persistently aggravated, manifested by unsteadiness in walking, urinary incontinence, and mental decline. Once hydrocephalus appears, patients are advised to undergo surgery as soon as possible. If they can recover to a healthy level, they can survive as long as normal people.