Why is my hair flaking so bad? wtf is going on!?

MY HAIR FLAKES VERY VERY BADLY! I HAVE DREAD LOCKS ANTHE FLAKES ARE REALLY REALLY MAKING MY LIFE DIFFICULT! THE FRONT PORTION OF MY HEAD IS GENERALLY WHERE THE FLAKES ARE AN ITS KILLIN ME! ITS LIKE THEY STICK TO MY SCALP AN I HAVE TO SCRATCH IT AN THEN THE FLAKES COME UP AN THEN I HAVE TO GET ALL THE FLAKES OUTTA MY DREADS BY LOOKIN IN THE MIRROR AN HOLDIN EACH DREAD UP AN PICKIN THE FLAKES OUT OF THEM! THEN WHEN I WAS MY HAIR, WHERE THE CLUNCKED UP FLAKES WERE BEFORE I WASHED MY HAIR WERE IT MAKES MY SCALP LIGHTER THEN THE COLOR IT SHOULD BE..MOST OF THE TIMES IT MAKES IT RED! I JUST DONT KNOW WHAT TO DO ANYMORE AN I NEED HELP! IS THERE A CERTAIN SHAMPOO I SHOULD USE OR A CERTAIN GREASE OR SOME OIL? IM USING HEAD AN SHOULDERS DRY SCALP SHAMPOO AS OF NOW AN IT DOES OK BUT NOT TO MY SATISFACTION! I REALLY NEED SOME HELP WITH THIS SO THAT I CAN PUT AN END TO IT! I HAVE HAD DREADS NOW FOR A COUPLE OF YEARS AN I LOVE THEM SO MUCH BUT THE FLAKES ARE MAKIN ME WANNA CUT THEM BUT I DONT WANT TO DO THAT! I JUST NEED TO GET THE FLAKES OUT OF THE PICTURE. PLEASE, I NEED SOME GOOD ADVICE