Leviticus 13:21-23

21If the red mark is not under the skin, it might not be a bad disease. There may not be any white hair on the red mark and the mark may be less red. If that is true, it might not be a bad disease. The priest must keep the person separate from the people for seven days.

22If the red mark becomes bigger, the priest must say that the person has a bad disease.

23If the red mark is not becoming bigger, the disease is getting better. It is a mark that remains on the skin from the boil. The priest must say that the person is now clean again.