Leviticus 13:40-44

40“If a man’s hair has fallen from his head, he is bald. He is clean.

41Or if the borders of his face become bald, his forehead is bald. He is clean.

42But if on the baldhead or bald forehead, there is a reddish-white plague, it is tza'arat breaking out in his baldhead or bald forehead.

43Then the kohen is to examine him, and behold, if the rising of the plague is reddish-white on his bald head or bald forehead, like the appearance of tza'arat in the skin of the flesh,

44he is a man with tza'arat He is unclean. The kohen should definitely pronounce him unclean—his plague-mark is on his head.