Yellow mucus stool, i.e. yellow mucus stool, may be caused by bowel cancer, or it may also be caused by intestinal flora imbalance, chronic gastroenteritis, irritable bowel syndrome and other reasons. 1. Bowel cancer: Early symptoms of bowel cancer are not typical, usually with the increase of tumor volume, patients may have diarrhea, constipation, mucus, pus and blood stools, etc. The appearance of yellow mucus stools may be the mucus near the rectum and anus, which may not necessarily be bowel cancer. 2. Dysbiosis of intestinal flora: patients with dysbiosis of intestinal flora will have symptoms such as abdominal distension, abdominal pain, diarrhea, etc. The stool character may be manifested as yellow mucus and watery stool. 3. Chronic gastroenteritis: when chronic gastroenteritis is severe, patients may also have the symptoms of yellow mucus stool or watery stool, due to the feces and intestinal fluids mixed together, it will be manifested as yellow mucus stool. 4. Irritable bowel syndrome (IBS): In addition to yellow mucus in the stool, it is also accompanied by abdominal pain, bloating and change in bowel habit, which can be relieved after defecation. Due to the complexity of the causes, it is recommended that patients with symptoms of yellow mucus stools go to a regular hospital in time to get a clear diagnosis and targeted treatment to avoid delaying the condition and causing adverse consequences.