The back right side of my scalp itches in the area of my VP shunt and past surgical scars. Why?

THIS IS CAUSED BY YOUR SCAR.THE SKIN AROUND IT SOMETIMES DOES NOT FULLY RECOVER FROM THE SURGERY,THE SKIN CAN SOMETIMES BE PERMANATLY DRY.JUST PUT SOME SKIN LOTION ON IT EVERYDAY(WITH ALOE).THIS WILL DO 2 THINGS RELIEVE THE ITCH FOR THE SHORT TERM,AND IN THE LONG TERM,MIGHT REGENERATE YOUR SKIN TO GROW BACK A LITTLE LESS DRY.THIS WILL SOLVE YOUR PROBLEM DOWN THE LINE...TRY IT..YOU WILL THANK ME FOR IT.|||Probably due to small nerve endings that are %26quot;firing%26quot; but were damaged due to the cut. I have an abdominal scar from a 1990 appendectomy that continues to itch to this day,right now even|||tissue thats healing tends to be itchy.|||maybe some messed up hair folicles in the scar are bothering you, also it depends how old the scars are as they still can be healing underneath even after it looks all better on the outside.