Hydrocephalus does not usually heal on its own. Hydrocephalus occurs when there is a problem with the cerebrospinal fluid circulation pathway and an increase in cerebrospinal fluid secretion causes hydrocephalus. If there is an obstruction in the cerebrospinal fluid circulation pathway, such as a brain tumor that compresses the aqueduct, the cerebrospinal fluid circulation pathway will be blocked, resulting in obstructive hydrocephalus. In addition, cerebrospinal fluid absorption disorders can also lead to hydrocephalus, for example, subarachnoid hemorrhage can cause a decrease in absorption of cerebrospinal fluid by the arachnoid granules, resulting in hydrocephalus. Hydrocephalus occurs mainly due to dysfunction of the corresponding location in the skull. As long as hydrocephalus does not cause clinical symptoms, it can be temporarily observed. If hydrocephalus causes symptoms, such as headache, unstable walking of the lower limbs, mental retardation, and urinary incontinence, surgery is required.