Diarrhea that has been watery for two days is mostly due to rotavirus infection, acute enteritis, and functional diarrhea. Patients can promptly go to the hospital for routine stool and blood tests to determine the cause of the disease and then use medication. Common causes 1, rotavirus infection: rotavirus can infect the epithelial cells of the small intestine through the gastrointestinal tract, causing cell damage and causing diarrhea, the main symptoms are watery or egg-shaped stools, accompanied by fever, vomiting symptoms; 2, acute enteritis: acute gastroenteritis is mainly due to unclean diet, bacterial infection resulting in acute inflammatory changes in the mucosa of the gastrointestinal tract, the main symptoms are severe diarrhea. The stool is watery or mucus-like, and accompanied by nausea, vomiting abdominal pain and other symptoms; 3, functional diarrhea: functional diarrhea is generally caused by gastrointestinal dysfunction, the onset of autonomic dysfunction, mental stress, irritable bowel syndrome and other factors. Patients will repeatedly appear drainage like stools or thin stools, not accompanied by abdominal pain or other discomfort. Treatment 1, general treatment: diarrhea for two days is watery stool, easy to cause electrolyte disorders, at the same time, pay attention to drink more water to replenish water to prevent dehydration and electrolyte disorders; 2, anti-inflammatory treatment: patients with acute gastroenteritis can take anti-inflammatory drugs such as levofloxacin, norfloxacin under the guidance of a doctor for anti-inflammatory treatment; 3, antidiarrheal treatment: can take montelukast, etc. for antidiarrheal treatment; clear for functional diarrhea Patients who are clearly functional diarrhea, can directly use the whole intestine raw, montmorillonite and multi-enzyme tablets and other drugs for regulation. Patients should pay attention to the daily diet must be mainly light, eat more warm, easy to digest food, such as vegetable soup, millet porridge, noodles, ravioli, etc.. Avoid eating spicy and stimulating, greasy, too sweet, too acidic food as well as wine, strong tea, coffee and other beverages to avoid stimulating the stomach and intestines, increasing the burden on the intestines and affecting the recovery of the disease.