Leviticus 13:41

then the priest shall examine them; and behold, if the bright spots on the skin of their body are a dull white, it is a harmless rash, it has broken out in the skin; he is clean.

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

But if there is in the bald head, or the bald forehead, a reddish-white plague; it is leprosy breaking out in his bald head, or his bald forehead.

Then the priest shall examine him; and, behold, if the rising of the plague is reddish-white in his bald head, or in his bald forehead, like the appearance of leprosy in the skin of the flesh,