I m trying to research for my brother; he had brain surgery 3 years ago.for water on the brain and was given a brain shunt which is in to help drain; He is 45, he recently (past 6 months) has become forgetful, lethargic at times, nervous at times, repeating himself, confused at time and has a sudden change in personality; he s behaving innappropriate with women and my sister in law is upset. He told me he thinks he is going crazy. He says he doesn t know why he s acting this way. We are worried.