The minimum size of a bright spot must be that of a Cilician split bean squared. The space covered by a split bean equals that of nine lentils. The space covered by a lentil equals that of four hairs; It turns out that the size of a bright spot must be no less than that of thirty-six hairs.

If a bright spot was of the size of a split bean and in it there was quick flesh of the size of a lentil: If the bright spot grew larger it is unclean, but if it grew smaller it is clean. If the quick flesh grew larger it is unclean, and if it grew smaller it is clean.

If a bright spot was larger in size than a split bean and in it there was quick flesh larger than a lentil, irrespective of whether they increased or decreased, they are unclean, provided that they do not decrease to less than the prescribed minimum.

If a bright spot was the size of a split bean and quick flesh the size of a lentil encompassed it, and outside the quick flesh there was another bright spot, the inner one must be isolated and the outer one must be certified unclean. Rabbi Yose says: the quick flesh is not a sign of uncleanness for the outer one, since the inner bright spot is within it. If it decreased or disappeared: Rabban Gamaliel says: if its destruction was on its inner side it is a sign of spreading of the inner bright spot while the outer one is clean, but if its destruction was on its outer side, the outer one is clean while the inner one must be isolated. Rabbi Akiva says: in either case it is clean.

Rabbi Shimon said: when is this the case? When the quick flesh was exactly the size of a lentil. But if it was larger than a lentil, the excess is a sign of spreading of the inner one, and the outer one is unclean. If there was white scurf less that the size of a lentil, it is a sign of the spreading of the inner bright spot but it is not a sign of spreading of the outer one.

There are twenty-four tips of limbs in the human body that do not become unclean on account of quick flesh: the tips of the fingers and the toes, the tips of the ears, the tip of the nose, the tip of the penis; and also the nipples of a woman. Rabbi Judah says: also those of a man. Rabbi Eliezer says: also warts and warts with thin necks do not become unclean on account of quick flesh.

The following places in a person do not become unclean on account of a bright spot: the inside of the eye, the inside of the ear, the inside of the nose and the inside of the mouth, wrinkles, wrinkles in the neck, under the breast and the armpit, the sole of the foot, the nails, the head and the beard; and a boil, a burn and a blister that are festering. All these: Do not become unclean on account of negaim Do not combine with other negaim, A nega is not considered to spread into them, Do not become unclean on account of quick flesh, And they do not act to prevent a person from being considered to have turned completely white. If subsequently a bald spot arose in the head or beard, or if a boil, a burn or a blister formed a scar: They may become unclean by negaim, But they do not combine with other negaim, A nega is not considered to spread into them, And they do not become unclean on account of quick flesh. But they do act to prevent a person from being considered to have all turned white. The head and the beard before they have grown hair, and warts with thin necks on the head or the beard, are treated as the skin of the flesh.