Leviticus 13:20

13:20 The priest will then examine it, and if it appears to be deeper than the skin and its hair has turned white, then the priest is to pronounce the person unclean. It is a diseased infection that has broken out in the boil.

Leviticus 13:4

A Bright Spot on the Skin

13:4 “If it is a white bright spot on the skin of his body, but it does not appear to be deeper than the skin, and the hair has not turned white, then the priest is to quarantine the person with the infection for seven days.