Yellowish watery stools are mostly caused by acute gastroenteritis due to unclean diet, but also gastroduodenal ulcer, dyspepsia and other gastrointestinal diseases. 1. Acute gastroenteritis: when the patient’s diet is not clean, contaminated by bacteria, viruses and other pathogenic microorganisms, it may lead to gastrointestinal mucosal infection, causing acute gastroenteritis, so that the patient’s gastrointestinal peristalsis disorders, diarrhea, abdominal pain, nausea and vomiting, fever, etc., the patient’s stools are not shaped, the appearance of yellowish watery stools. 2. Indigestion: chronic gastritis, gastroduodenal ulcer, gastrointestinal cancer and other gastrointestinal diseases will affect the digestion and absorption of food and peristaltic function of gastrointestinal, resulting in diarrhea and yellowish watery stool. 3. Cold abdomen: When the abdomen is cold or cold food is eaten, the intestinal peristalsis will be accelerated, and then there will be yellowish watery diarrhea. There are many other reasons for yellowish watery diarrhea, if the patient has long-term or recurrent yellowish watery diarrhea, it is recommended to consult a doctor in time to find out the cause of the disease and carry out targeted treatment to avoid delaying the condition.