There are variations of hydrocephalus. As mentioned above, not all hydrocephalus is due to blockage of CSF. In normal pressure hydrocephalus, the buildup of CSF is very gradual. It is seen in older adults, and is an uncommon cause of dementia. Symptoms include memory problems, gait problems (difficulty walking), and urinary incontinence. In appropriate cases, treatment with a VP shunt can improve these symptoms.