Does anyone else have experience of terrible tiredness. I have never slept well and have always read or listened to music or audio books until the early hours and I still do this. But I find I can then sleep until 2 in the afternoon and then maybe go back to bed and sleep from about 4 until 8. I think I once read that people with dementia turn the days and nights round but this doesn't feel like that it is the most tired I have ever been. I wonder if it is because we have to concentrate so hard to do anything?