Yellowish stool is mainly due to the mixing of bile and stool residue, which is a normal stool color. The main color of bile is yellow, and the blood circulates from the liver through the duodenal jugular to the small intestine and large intestine to excrete bile. At this time, dark green bile and stool mixed together, but also with water mixed together, the stool will appear yellowish. If the stool is not yellowish and is tarry black, it may be associated with upper gastrointestinal bleeding. Stools should not only look at the color, but also look at the nature of the stool, the number of bowel movements, usually molded yellow soft stools, once a day or once every two days. If the stools are thin and irregular, and the frequency of bowel movements is high, then diarrhea is considered, which can be caused by acute gastroenteritis, amoebic dysentery, bacillary dysentery, and various other causes. If you experience any of the above symptoms, it is recommended that you go to the hospital for early and proper treatment.