Over time these screws can work their way loose causing the bottom of the door to drag on the floor.
Stop door scraping floor.
Lift the door by grasping both handles and gently putting upward pressure.
There is also a planer attachment for the dremels which works pretty well for light jobs and in some cases you can even do it without removing the door.
First run a piece of paper at the bottom of door to identify where is sticky.
Use a pencil or a label to mark where you need to sand down.
The dragging door corner can scrape the floor or threshold underneath the bottom of the door which can tear vinyl floors and scratch wood floors.
You can get rid of the annoyance of lifting a.
If you recently installed carpet or a new floor then you will need to plane the bottom of the door with either a hand planer or by sanding.
Check to see if this relieves the rubbing.
Use a screwdriver to tighten the screws in the top hinge on the door and frame.
If it does tighten the hinge screws with a ratcheting screwdriver.