The priest is to examine it, and if it appears to be more than skin deep and the hair in it has turned white, the priest is to pronounce him unclean; it is a defiling skin disease that has broken out in the boil.
In context
18When someone has a boil on his skin that has healed, 19and in the place of the boil a white swelling or a reddish-white spot appears, he must show himself to the priest. 20The priest is to examine it, and if it appears to be more than skin deep and the hair in it has turned white, the priest is to pronounce him unclean; it is a defiling skin disease that has broken out in the boil. 21But if, when the priest examines it, there is no white hair in it, and it is not more than skin deep, and it has faded, the priest is to isolate him for seven days. 22If it spreads further on the skin, the priest is to pronounce him unclean; it is a diseased sore.