On Wednesday, September 9, 2015 at 6:51:23 PM UTC-4, Bob wrote:
Before replacing the carpet in my bedroom I cut the carpet and screwed
down the sub floor to quiet down the squeaks.

Weeks later, the tiled floor in the bathroom adjacent to the bedroom now
has a slight bulge upwards. The bulged area is about 6 inches away from
the closest screwed down sub floor.

I guess screwing down the sub floor prevents them from moving
horizontally due to moisture expansion.

If I cut slits between the sub floor boards with a circular saw, would
that allow the floor to expand without bulging? Or should I just remove
the screws and live with squeaks?

They probably didn't leave the required gaps between sheets
to allow for expansion. Still seems unusual that just screwing
it down more would cause this. I'd certainly try doing a relief
cut, you would think that would work, if that's the source of
the problem.