Leviticus 13:44-46

44the man is indeed infected with a skin disease and is unclean. The priest must pronounce him ceremonially unclean because of the sore on his head.

45“Those who suffer from a serious skin disease must tear their clothing and leave their hair uncombed. They must cover their mouth and call out, ‘Unclean! Unclean!’

46As long as the serious disease lasts, they will be ceremonially unclean. They must live in isolation in their place outside the camp.