The green colors appear first in the lower abdomen. That’s the bacteria from the colon breaking free and starting to take over. They are liquefying the cells of the organs, which means fluids are sloshing free. The stomach swells as gas starts to accumulate from the bacteria’s “digestive action” (i.e., bacteria farts). As the bacteria multiply and spread, so does the green discoloration, eventually ripening to a darker green or black.
