My poor Mum is hiding her purse, keys, phone etc because she thinks her neighbour is braking in and stealing from her, it's very upsetting for her and I"m just a bit lost with how best to deal with it, usually the items are found when I go to visit her, Ive tried to reassure her that she's safe and just misplacing things but she gets upset and angry, I believe its a common problem with dementia sufferers so any advice would be really appreciated, thank you.