Where does the Nega reappear?
Sifra: The word "Od" implies that it reappears on the same spot as it appeared the first time - in which case the owner was obligated to place a patch to replace the section that was removed and burnt. 1
See Torah Temimah, note 227.
What is the Shi'ur of the patch that the owner sews on and of the Nega that reappears?
Sifra: The word "Od" implies that it is the same size as the previous Nega would have had to be - the size of a G'ris.
What is the definition of "Porachas"?
How much of the Beged must be burned in the previous Pasuk and how much must be burned here?
Rashi: In Pasuk 56 it is only the affected piece of garment that needs to be burned, whereas here it is the entire garment.