How do I use a router on a hinge for a door that keeps getting stuck?

Our bathroom door keeps getting stuck and it is clearly visable that the lower part of the door is meeting the frame before the upper part of the door. It's almost like it has been put in slightly diagonally. It was suggested to me that I use a router on the lower hinge to straighten it up. I have no idea when... show more Our bathroom door keeps getting stuck and it is clearly visable that the lower part of the door is meeting the frame before the upper part of the door. It's almost like it has been put in slightly diagonally. It was suggested to me that I use a router on the lower hinge to straighten it up. I have no idea when it comes to DIY and most of the videos on the internet are useless. If anyone can help ASAP it would be great.
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