I had a bit of that in my first 10 days or so. Nothing severe, but sheets were not exactly fresh.
I think it's probably normal if you are not experiencing constant clamminess or other symptoms.
The body likes to get rid of toxins and sweating is one way to unload some of the many drugs your system has absorbed over the past while.
I hear that anesthesia can affect your hair (brittle, dry, hairloss) and it takes a long time, sometimes a couple of months, to get out of your system fully.
I do not know if that last bit about the time is true, but I can attest to it affecting hair and skin.
Kev