My 88yr old mother is clearly experience the early stages of dementia. One possible symptom though has us confused. She can be perfectly well one day and the next morning too weak to get out of bed. This can be for a few hours or a whole day on occasion.This has been going on for a couple of months. No medical professional has been able to come up with a diagnosis( even during a stay in hospital). I wonder if anyone else has any experience of this? Only yesterday she went from too weak to eat to totally fine in a matter of hours! It is very tempting to think that she is being dramatic or attention seeking but really don't think that's it. Any suggestions please?