18 "When someone has a boil on his skin and it heals, 19 and in the place where the boil was, a white swelling or reddish-white spot appears, he must present himself to the priest. 20 The priest is to examine it, and if it appears to be more than skin deep and the hair in it has turned white, the priest shall pronounce him unclean. It is an infectious skin disease that has broken out where the boil was. 21 But if, when the priest examines it, there is no white hair in it and it is not more than skin deep and has faded, then the priest is to put him in isolation for seven days. 22 If it is spreading in the skin, the priest shall pronounce him unclean; it is infectious. 23 But if the spot is unchanged and has not spread, it is only a scar from the boil, and the priest shall pronounce him clean.