Leviticus 13:27

“Or when the body has a burn from fire on its skin, and the raw flesh of the burn becomes a bright spot, reddish-white, or white,

then the priest shall examine it; and behold, if the hair in the bright spot has turned white, and its appearance is deeper than the skin, it is leprosy. It has broken out in the burning, and the priest shall pronounce him unclean. It is the plague of leprosy.

But if the priest examines it, and behold, there is no white hair in the bright spot, and it isn’t deeper than the skin, but has faded, then the priest shall isolate him seven days.

If the bright spot stays in its place, and hasn’t spread in the skin, but is faded, it is the swelling from the burn, and the priest shall pronounce him clean, for it is the scar from the burn.

“When a man or woman has a plague on the head or on the beard,

then the priest shall examine the plague; and behold, if its appearance is deeper than the skin, and the hair in it is yellow and thin, then the priest shall pronounce him unclean. It is an itch. It is leprosy of the head or of the beard.