I've had a bad case of the stomach flu for past few days and now my stool is yellow to pale orange. Should I be concerned?

Virus. If this is a viral intestinal tract infection causing diarrhea or loose stools, the color change is to be expected due to more rapid transit of stools through the intestinal tract and would be a temporary situation. Disorders of liver, pancreas or gall bladder can also cause these color changes. If bm's don't revert to normal after several days, consult your physician or gastroenterologist .