Leviticus 13:12-17

12But if the skin disease breaks out all over the skin so that it covers all the skin of the stricken person from his head to his feet so far as the priest can see,

13the priest will look, and if the skin disease has covered his entire body, he is to pronounce the stricken person clean. Since he has turned totally white, he is clean.

14But whenever raw flesh appears on him, he will be unclean.

15When the priest examines the raw flesh, he must pronounce him unclean. Raw flesh is unclean; this is a serious skin disease.

16But if the raw flesh changes and turns white, he is to go to the priest.

17The priest will examine him, and if the sore has turned white, the priest must pronounce the stricken person clean; he is clean.