Diarrhea with red watery stools may be caused by dietary factors, intestinal infections and inflammatory bowel disease. 1. Dietary factors: If you eat too much colorful food such as dragon fruit, it can cause abdominal pain, diarrhea and other symptoms of indigestion, and the color of the stool is red. 2. Intestinal infections: such as bacillary dysentery, which can be manifested as nausea, vomiting, abdominal pain, diarrhea, mucous blood stools, etc., which can be manifested as diarrhea and red watery stools. 3. Inflammatory bowel disease: such as ulcerative colitis, abdominal pain, diarrhea, blood in the stool and other symptoms, manifested as diarrhea and red watery stool. It is recommended that patients with diarrhea and red watery stools go to the hospital in a timely manner to clarify the cause of the disease and standardize the treatment under the guidance of the doctor.