Hello, Im just wondering if anyone knows what the earliest possible symptons of pre-senile dementia i.e. personallity changes, moods, depression etc. My boyfriends dad died of dementia when he was just 42 yrs old and my boyfriend remembers him being taken into hospital at 37 yrs old. His dads sister, cousin and dad also had dementia and have all died at approx 42 yrs old. My boyfriend obviously worries that he too may get dementia - he is 36 in August - and he seems to be distancinig himself from me and his two children. Im unsure whether to think that this is some very early sign of dementia or if its due to him going through a divorce from a previous marraige. So I just wondered if anyone had any advice on what to look out for with regards to very early signs. Many thanks in advance.