It takes 1-2 months for hydrocephalus to be completely absorbed after a brain hemorrhage. However, it must be clear that not all patients will have a remission process, and even the hydrocephalus will get worse with the gradual extension of time. Patients must understand that hydrocephalus is a corresponding manifestation of the mismatch between the process of formation and absorption of brain fluid, as well as the obstruction of cerebrospinal fluid circulation in the brain. In this case, hydrocephalus is very easily formed when the corresponding normal metabolic pathway of cerebrospinal fluid in the brain is broken after cerebral hemorrhage. Although sometimes hydrocephalus can be cured by self-mediation, more often hydrocephalus will gradually increase and can only be treated by surgery, and it is not possible to be absorbed by itself, so it must be judged according to the actual condition. If the hydrocephalus is not completely absorbed after 1 month, it needs to be treated by surgery.