That which spreads completely from a tamei becomes tahor. [If] the extremities return [to normal appearance], he becomes tamei until his baheres becomes smaller than a gris. [That which spreads completely] from a tahor becomes tamei. [If] the extremities return [to normal appearance], he remains tamei until his baheres returns to the way it was.

A baheres the size of a gris contains living skin the size of a lentil. [If] it covers him completely and then the living skin disappears, or if the living skin disappears and then [the nega] covers him completely, [the afflicted person] is tahor. [If] living skin appeared [in a completely expanded nega], he is tamei. [If] white hair appeared on it, R’ Yehoshua renders it tamei, and the Sages render it tahor.

A baheres with white hair that [subsequently] covered him completely is tahor, even though the white hair remains. A baheres that expanded [and subsequently] covered him completely is tahor. All of these [cases] become tamei if the extremities return. [If] it spread partially, he is tamei; [if] it covered him completely, he is tahor.

Whenever extremities spread completely and the spreading rendered a tamei tahor, when they return, they render him tamei. Whenever extremities return and the returning rendered a tahor tamei, [if] they became covered [with nega], he is tahor. If they became uncovered, he is tamei, even a hundred times.