What Could Be The Scaly Rashes On Breasts In 10 Year Kid?

MY LITTLE DAUGHTER WHO IS TEN YEARS OLD WHO HAS JUST BEGAN TO DEVELOP LITTLE BREAST HAS SCALY NON ITCHING RASHES ON HER BREASTS AND THE AREA NEAR THE BREAST AS THOUGH SHE HAD BEEN WEARING BRASSIERS. IT IS SCALY AND DRY MOVING UP TOWARDS THE SHOULDER AREA .IT HAS BEEN THERE SINCE HER BREAST STARTED TO FORM SOME EIGHT MONTHS AGO ; SHE DID NOT REPORT TO ME B'COS IT DOES NOT ITCH HER AND SHE THOUGHT IT WAS NO PROBLEM. WE ARE BLACK AFRICANS AND IN MY COUNTRY I NEVER SAW A THING LIKE THAT. WHAT DO I DO,IS IT A RARE SICKNESS ; PLEASE HELP US. MADDY THEODORA