Leviticus 13:29-32

29A person may have a mark that hurts on his head.

30The priest must look at the mark. The mark may be under the skin and on the skin, and it may have thin yellow hair on it. That is a bad disease. He could give that disease to other people. The priest must say that the person is not clean.

31If the mark is not under the skin, it might not be a bad disease. If there is not any black hair on the mark, it might not be a disease. The priest must keep that person separate from the people for seven days.

32On the seventh day, the priest must look at the mark that is hurting. The mark might not be under the skin. There might not be any yellow hair on it.