R’ Chaninah, the administrator of the Kohanim, says: There are sixteen appearances of negaim. R’ Dosa ben Harkinos says: There are thirty-six appearances of negaim. Akavya ben Mahalalel says: Seventy-two. R’ Chaninah, the administrator to the Kohanim, says: Negaim are not examined initially on Sunday, because its seventh day falls on Sabbath; nor on Monday, because its second week falls on Sabbath; nor on Tuesday for houses, because the third week falls on Sabbath. R’ Akiva says: [A nega] is examined on any day. If [an examination] falls on Sabbath, it is postponed until after Sabbath, and this causes both leniency and stringency.

How [does it cause] leniency? It contained white hair and the white hair disappeared; [the two white hairs] were white and turned black; one [was] white and one black, and they both turned black; [the hairs were] long and became short; one [hair was] long and one short, and they both became short; a boil touched one or both of the [white hairs]; a boil surrounded one or both [hairs]; [the hairs] were separated by a boil, the healing skin of a boil, a burn, the healing skin of a burn, or a dull white blemish; [the nega] contained living skin and the living skin disappeared; [the nega] was square and became round or oblong; it was surrounded, and moved to the side; it was together and became scattered; a boil covered, surrounded, divided, or decreased [the michyah] — whether this was done by a boil, the living skin of a boil, a burn, the living skin of a burn, or a dull white blemish; [the nega] had an expansion and then the expansion disappeared, or the original nega disappeared, or became smaller so that the two together do not contain a gris; a boil, the living skin on a boil, a burn, the living skin on a burn, or a dull white blemish divided between the original nega and its expansion. These cause leniency.