Normal cranial pressure hydrocephalus is a type of hydrocephalus in which the ventricles of the brain are enlarged although the cerebrospinal fluid pressure is normal, and the clinical manifestations are characterized by unsteady gait, unresponsiveness, and urinary incontinence. The general etiology is due to diseases such as subarachnoid hemorrhage and meningitis, and in some patients the etiology is unknown. General treatment is mostly preferred to lateral ventriculoperitoneal shunt, timely detection, early treatment, most can be cured, those who can not accept surgical treatment, the results are poor. General cognitive difficulties, walking difficulties, and cognitive impairment are complications of this disease. The diagnosis of this disease can be clarified by lumbar puncture, CT, and magnetic resonance imaging.