There are many causes of hydrocephalus, and it is important to make specific judgments based on the circumstances. In some infants, congenital hydrocephalus can be caused by intracranial birth injuries, which occur during the birth process and lead to intracranial hemorrhaging. It can also be due to congenital developmental abnormalities, such as anencephaly or spina bifida. In adults, hydrocephalus can be caused by intracranial tumors, such as choroid plexus papillomas, which overproduce cerebrospinal fluid. Others might develop hydrocephalus due to blockages caused by blood clots, such as cerebral hemorrhage or subarachnoid hemorrhage. There are also cases where hydrocephalus can occur alongside chronic conditions like subdural hematoma or epidural hematoma, depending on the specific clinical presentations of the patients.