Leviticus 13:14KJV

12And if a leprosy break out abroad in the skin, and the leprosy cover all the skin of the plague from his head even to his foot, wheresoever the priest looketh;

13Then the priest shall consider: and, behold, the leprosy have covered all his flesh, he shall pronounce clean the plague: it is all turned white: he clean.

14But when raw flesh appeareth in him, he shall be unclean.

15And the priest shall see the raw flesh, and pronounce him to be unclean: the raw flesh unclean: it a leprosy.

16Or if the raw flesh turn again, and be changed unto white, he shall come unto the priest;