Black dots on hedgies quills

My hedgehog Fabio has little black specks on his quills. Hes quilling i think so one of the quills that fell out has the black specks on it and i found out that the specks can come off cause i wiped some of them off with my finger. But after giving him a bath for dry skin the specks didnt come off. I dont know what they are. He is also itching alot but i think that may be because hes quilling. Does anyone know what the black specks on his quills could be?