Use a screwdriver to tighten the screws in the top hinge on the door and frame.
Door catching on floor.
Over time these screws can work their way loose causing the bottom of the door to drag on the floor.
You can carefully pry up the doorstop with a thin pry bar and re nail to fit the warped door.
The door stop is the vertical strip of wood that runs down the center of the door casing which serves to stop the door from swinging any farther.
I also made sure there is spare space between the top of the door and the frame when it was closed so it can still be closed even when it s a bit higher.
Houses settle over time which often causes a door to sag inside its frame.
A dragging corner makes a door difficult to open and close.
The dragging door corner can scrape the floor or threshold.
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.