UTI infections can drive you crazy.
I had no idea what an UTI infection can do to the elderly. They can see things that aren't there, make them think crazy thoughts and even change the personality. My mom was doing all kinds of crazy things, getting dressed all by herself in the middle of the night, walking around the house at night and wanting to eat at 3:00 am. I finally noticed that her urine smelled terrible and took her to the doctor asking them to check for UTI. They did and sure enough had to put her on antibiotics. Now her actions are back to normal and I can finally get to sleep at night. PLEASE, if your parent is acting strange, more strange than usual, take them in to check for UTI. UTIs in the elderly are often mistaken as the early stages of dementia or Alzheimer's, according to NIH, because symptoms include:
Confusion, or delirium-like state
Other behavioral changes
Poor motor skills or dizziness
Sometimes, these are the only symptoms of a UTI that show up in the elderly—no pain, no fever, no other typical symptoms of a UTI.