About Three Weeks Ago I Got Hit With A Softball

About three weeks ago I got hit with a softball on the inner side of my shin. The week proceeding it hurt a lot when walking. It has now been two, almost three, weeks and I still have a know/bump on the area the size a golfball that has not gone away. It hurts when touched but not when walking anymore. I'm used to gettin ghit sometime sbut the bumps don't normally last this long.