Knot above belly button

Answer 1

You can't "do" anything, this "knot" is part of the umbilical cord, which is attached to your belly button, it is perfectly normal and should be there, but, if this "knot" continues to cause pain you should seek medical attention as this could lead to a hernia, very common and easy to sort out

Hope this helps:)

Answer 2

This could be an unbilical hernia but it is a good idea to ask your doctor as the cause could be any number of other things