you must shave off the hairs around the infection, but not those on it. Then the priest will tell you to stay away from everyone else for another seven days.
it must be examined by a priest. If the infection seems more than skin deep, and the hair in it has thinned out and lost its colour, he will say, “This is leprosy—you are unclean.”
But if the infected area is white and only skin deep, and if the hair in it hasn't turned white, the priest will order you to stay away from everyone else for seven days.