I Can't Stop Thinking About...[POSSIBLE SPOILERS]
...by practical things.
If I were in the doctor's place, I'd be going nuts without a shower for...days? I'd really want to brush my teeth. Change my clothes.
And what about (here come the spoilers...) the guy locked in the storage closet (or furnace room?)...He hasn't had water in...what...more than a day, right? But he doesn't struggle to speak. Has he not had to take a pee or a poop? If he did...wouldn't the smell be kinda...well, you get the point.
I'm kinda enjoying the show, though it's very unsettling. But those kinds of things are constantly on my mind while watching.