Could Behavioral Issues In Dementia Mimic Symptoms Of Brain Damage?

hi my mum has dementia and i tried everything known in the chemical there not no thing i have not tried thats including e 45 cream mind you we only used this once i cant find anything on her like rash or scratch nothing its stops her from even trying things in her life i was wondering in dementia once that part of brain is damaged will anything work at this point its not all the time either can this be behavioural as well as the brain damage wondering if i am wasting my time trying things when it could be something i have not thought of