Leviticus 13:29-30

13:29 If a man or woman have a plague upon the head or the beard; 13:30 Then the priest shall see the plague: and, behold, if it [be] in sight deeper than the skin; [and there be] in it a yellow thin hair; then the priest shall pronounce him unclean: it [is] a dry scall, [even] a leprosy upon the head or beard.

Leviticus 13:43-44

13:43 Then the priest shall look upon it: and, behold, [if] the rising of the sore [be] white reddish in his bald head, or in his bald forehead, as the leprosy appeareth in the skin of the flesh; 13:44 He is a leprous man, he [is] unclean: the priest shall pronounce him utterly unclean; his plague [is] in his head.