Mum is 88 and has had Alzheimer's for about 5 years. She moved in with us at Christmas 2013 when my step father died. Recently she has started to bring back food about twice a month. This is not vomiting. There is no retching and the food is still recognisable 4 or 5 hours after she swallowed it - no digestion has taken place. I have tried to explain to the doctor who thinks a water infection may have caused the vomiting! I have also searched the internet and found lots about acid reflux, which is not the same thing. Please, does anyone else have experience of this and is there anything I can do about it. Mum gets so upset every time it happens, apologising about making a mess, etc.