Stool is usually brown because of a balance of bilirubin and bile. Some conditions can cause bright yellow or pale yellow poop or diarrhea. Possible causes include dietary factors, stress, celiac ...

Cystic fibrosis (CF) is a genetic disease that causes a buildup of mucus in organs throughout the body. Stool, or feces, can indicate how your gastrointestinal tract is functioning and whether ...