Diarrhea and yellow stools may be caused by acute enteritis, irritable bowel syndrome, hyperthyroidism and so on. 1. Acute enteritis: bacterial, viral or parasitic infections lead to acute infection of the intestinal tract, mainly manifested as diarrhea, abdominal pain, abdominal distension, fever, nausea, vomiting and other symptoms, which can cause diarrhea and yellow stools. 2. Irritable bowel syndrome: a common functional bowel disease, mainly manifested as abdominal pain, bloating, diarrhea, constipation and other symptoms, can be accompanied by fatigue, insomnia, anxiety and other symptoms, can also cause diarrhea stool yellow. 3. Hyperthyroidism: it can cause gastrointestinal peristalsis, which leads to diarrhea, causing diarrhea and yellow stools. Usually accompanied by palpitations, fear of heat, sweating, agitation, hyper appetite, hand tremor and other symptoms. There are many other causes of yellow diarrhea and stool, which should be taken seriously, and timely consultation should be made to identify the cause of the disease and follow the medical advice for further treatment or therapy.