Some hospitals hold "sharps," like fingernail files, fingernail clippers, razors, etc. They keep them for you and you can usually ask for them in order to use them. No glass bottles for shampoo or make-up, etc.
Some places allow phones and internet access; some do not.
I think those are the most important rules some places employ.
Others may come along and comment. Many have much more experience with hospitalization.

WC