Acute watery stool diarrhea is one of the common clinical symptoms, mainly caused by viruses or enterotoxin-producing bacteria, mostly rotavirus or toxin-producing bacterial infections, in children, especially in infants and young children under two years of age. Summer diarrhea is usually caused by bacterial infections, mostly mucus stools with fishy odor; autumn diarrhea is mostly caused by rotavirus, with dilute watery or dilute paste stools, but without fishy odor. During diarrhea, you need to fast, drink more sugar and salt water or fruit and vegetable juice, after relief, you can drink some rice soup, lotus root powder, rotten rice porridge and other liquid food. You can also drink some plain yogurt with beneficial bacteria, which can help regulate the gastrointestinal function. Mashing and steaming apples to eat can relieve diarrhea. Watery stool makes the body’s immune system drop, the body becomes abnormally weak, and over time may even cause other more serious diseases to appear. Experts point out that the watery stool examination methods include many, requiring you to actively choose the appropriate watery stool examination methods. Watery stool should do which examination 1, small intestine microscopy Although small intestine microscopy is not commonly carried out (new small intestine microscopy will soon be available), but it has more important diagnostic significance for small intestine malabsorption. Watery stool disease can be observed under direct vision of small intestine mucosa, and biopsy can determine the changes of microvilli and glands. 2, ultrasound, CT or MRI examination can observe the liver, biliary tract and pancreas and other organs with watery stool-related lesions, and can also provide a basis for intestinal tumor lesions. Therefore, ultrasound, CT and MRI examination have auxiliary diagnostic value for digestive malabsorption diarrhea and tumor diarrhea. 3, colonoscopy Colonoscopy has an important diagnostic value for terminal ileal lesions, such as intestinal tuberculosis, Crohn’s disease, other ulcerative lesions and large intestinal lesions, such as ulcerative colitis, colon and rectal polyps and cancer.