My Mum is immobile and uses a commode. The last two days she has urinated at breakfast time then doesn't urinate again until between 8-9pm in the evening. Yesterday she insisted that she didn't even need the toilet at 9pm but I said everyone goes to the toilet before bed. During the night she then urinated about 4 times in the night. We are making sure she is drinking plenty during the day so I don't think she could be dehydrated. What is going on during the day surely this can't be normal?