Can you tell which it is.
Interior door suddenly now scraping floor.
Assuming the hinge screws are tight it may be that the only way to permanently fix the problkem is by rebuilding the door frame and or fix the slope in the floor.
Over time these screws can work their way loose causing the bottom of the door to drag on.
Use a pencil or a label to mark where you need to sand down.
First check that everything is square.
Doors bind and scrape for several reasons but it s frequently due to loose hinges or slight movement in the building which throws door openings slightly out of square.
Be careful not to cut the door too deep or too far.
Sandpaper can be used for small rubbing problems while the belt sander or circular saw are ideal for more extreme door sticking issues.
The dragging door corner can scrape the floor or threshold.
A dragging corner makes a door difficult to open and close.
Adjust the top hinge 1 use a screwdriver to tighten the screws in the top hinge on the door and frame.
Use sandpaper a belt sander or circular saw to remove the area where the door rubs.