Leviticus 13:14

12“If the leprosy breaks out all over the skin, and the leprosy covers all the skin of the infected person from his head even to his feet, as far as it appears to the priest,

13then the priest shall examine him. Behold, if the leprosy has covered all his flesh, he shall pronounce him clean of the plague. It has all turned white: he is clean.

14But whenever raw flesh appears in him, he shall be unclean.

15The priest shall examine the raw flesh, and pronounce him unclean: the raw flesh is unclean. It is leprosy.

16Or if the raw flesh turns again, and is changed to white, then he shall come to the priest.