Acute watery diarrhea is one of the most common clinical conditions, mainly caused by viruses or enterotoxin-producing bacteria. It is 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. Diagnosis: What symptoms are easily confused with watery stools? The peak of diarrhea occurs mainly from June to September and from October to January each year. In summer, diarrhea is usually caused by bacterial infection, mostly mucus stools with fishy odor; in autumn, diarrhea is mostly caused by rotavirus, with dilute watery or pasty stools, but without fishy odor. Clinical attention to distinguish from bacterial dysentery, cholera and other intestinal infectious diseases. Bacterial dysentery: Bacterial dysentery is an infectious disease of the intestinal tract caused by Shigella spp. There are clinical manifestations of systemic poisoning, abdominal pain, diarrhea, urgency, and pus and blood stools. Toxic bacillary dysentery has a rapid onset, sudden high fever, repeated convulsions, drowsiness, coma, rapid onset of circulatory failure and respiratory failure, while the intestinal symptoms are mild or absent, and the condition is dangerous. The disease is treated with effective antibacterial drugs and has a high cure rate. The poor outcome or chronicity is mostly due to lack of formal treatment, untimely treatment, inappropriate use of drugs, or infection with drug-resistant strains of bacteria. It can occur throughout the year, but is more common in summer and fall. The incidence is generally higher in children, followed by young adults aged 20 to 39 years, with fewer elderly patients. Cholera: Cholera (cholera), is a virulent intestinal infection caused by Vibrio cholerae, usually serotype O1 Vibrio cholerae. Vibrio cholerae can produce cholera toxin, causing secretory diarrhea, even if no longer eaten, will continue to diarrhea, washed-up stool is the characteristic of cholera, severe cases lead to peripheral circulatory failure and acute renal failure. The onset of the disease is rapid and spreads quickly, and is an important cause of diarrhea in most parts of Asia and Africa, and is an international quarantine infectious disease. In China, it is a category A infectious disease. Generally, mild cases are common, and there are more carriers, but severe cases and typical patients can die if not treated in time.