All carers please be aware of how water infections/UTIs can affect dementia. Not enough information is given to new carers about this. If your person with dementia has a change of behaviour or starts with hallucinations, please take a water sample to the doctor for ruling this out. I can't express this enough after having the most terrible 3 months with my MIL. I look back now and realise that had I spotted this earlier, her fall and subsequent leg infection could have been averted. There were no symptoms except her being a little more confused and weaker than normal (she is very frail).