Leviticus 13:42-43

And if there is on the bald head or bald forehead a reddish-white sore, it is leprosy breaking out on his bald head or his bald forehead. Then the priest shall examine it; and indeed if the swelling of the sore is reddish-white on his bald head or on his bald forehead, as the appearance of leprosy on the skin of the body