I live with her so I am usually here 24/7 and have never seen any evidence of mice or fleas in her house. I even had exterminator come to hopefully make her feel better. Her doctor says it’s sundowners but how do I address her fears? This happens several times a day.
https://dailycaring.com/7-ways-to-reduce-dementia-sundowning-symptoms/
It's unfortunate that your gma's doctor can tell you she's sundowning, but not what to DO about it, huh? Sad too that most doctors don't know a darn thing about the brain or how it functions or stops functioning when certain dementias strike. My mother is 94 and lives in Memory Care. I'll be darned if I can talk her off the various ledges she's on every night, carrying on about the same things, too. No matter what I tell her, she has certain ideas in her head that won't be chopped out of there with a chisel! Sad but true. I distract her to the best of my ability, and then suggest she put on the tv and watch something silly to make her laugh. Maybe you can put on a favorite comedy for your grandma to watch when she gets talking about bugs? Nothing like a bit of laughter to diffuse an otherwise stressful situation.
Best of luck