Lately my dad, always stays in fear that some one is following him, whenever he goes out, even for a walk, some tries to harm him. He was ok till some time, but now he is getting very scary sometimes and get disturbed. He tries not to go out, not to talk to anyone at home even and feels like everyone is trying something bad for him.
We asked him to visit a doctor, but he disagrees.
Not sure what type of depression / phobia this is and how can we treat this?