Leviticus 13:19
and a white swelling or a reddish-white spot develops where the boil was, he must present himself to the priest.

Leviticus 13:23
But if the spot remains unchanged and does not spread, it is only the scar from the boil, and the priest shall pronounce him clean.

Leviticus 13:25
the priest must examine it. If the hair in the spot has turned white and the spot appears to be deeper than the skin, it is a disease that has broken out in the burn. The priest must pronounce him unclean; it is a diseased infection.