We know that the normal human intestine has a large number of anaerobic bacteria such as bifidobacteria and lactobacilli and a small number of aerobic bacteria. These bacteria in the intestine can not only fight against the colonization of some pathogenic bacteria, but also produce a variety of antigenic substances and promote the development and maturation of the body’s immune function, etc. However, when our immunity decreases or we use broad-spectrum antibiotics in high doses for a long time, it is easy to disrupt this state of flora balance and lead to dysbiosis of the intestinal flora. As a result, normal bacteria in the intestine such as bifidobacteria and enterococci are killed by antibiotics and their number is significantly reduced, while some pathogenic or conditionally pathogenic bacteria, such as pathogenic E. coli and Aspergillus, are active and form dominant bacteria. These pathogenic bacteria stimulate intestinal wall peristalsis, promote increased secretion of mucosal cells, or invade and damage intestinal mucosa, leading to the appearance of abdominal pain, diarrhea and other digestive symptoms. To treat intestinal dysbiosis, it is necessary to remove the causes of intestinal dysbiosis firstly, and then take micro-ecological regulators such as lactobacillus tablets, Pfeiffer, and intestinal regulator to adjust the function of gastrointestinal tract and stop diarrhea. At the same time, we should pay attention to replenish fluids to prevent dehydration and electrolyte disorders.