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. What are the causes of watery stools Watery stools occur for the following common reasons: 1, mostly rotavirus or toxin-producing bacterial infections, children, especially infants and young children within two years of age; 2, diarrhea occurs in the fall and winter, with rotavirus enteritis is likely to occur in the summer with toxic E. coli enteritis is likely to occur; 3, summer diarrhea is usually caused by bacterial infections, mostly mucus stools, with a fishy odor. 4, autumn diarrhea is mostly caused by rotavirus, to thin watery or thin paste stool is common, but no fishy odor. Pediatric rotavirus enteritis: rotavirus enteritis is an acute gastrointestinal infectious disease caused by rotavirus, the pathogen is mainly transmitted through the digestive tract, caused by group A rotavirus enteritis occurs mainly in infants and young children, the peak season is autumn, so the name of the infant fall diarrhea. The main clinical manifestations are: short incubation period, rapid onset, diarrhea, yellow watery stools, no mucus and pus, high volume, usually 5-10 times a day, most of them are accompanied by fever, some have respiratory symptoms, others have abdominal distension, vomiting, etc. Serious cases are often accompanied by isotonic dehydration, metabolic acidosis and electrolyte disorders, or myocardial damage, convulsions, etc. Ulcerative colitis arthritis: “enteropathic arthritis” (enteropathic arthritis) refers to arthropathies associated with Crohn’s disease or ulcerative colitis, and these lesions are linked by clinical and histological inflammation of the intestinal canal, altered intestinal permeability, and peripheral and mesial joint inflammation. of the intestine. There may be a genetic link. Approximately 20% of cases have peripheral arthritis and 10% to 15% of patients have axial arthritis. The disease has a tendency to recur, with factors such as emotional stress, trauma, overexertion, eating disorders, and upper respiratory tract infections. Systemic symptoms include anorexia, weight loss, normal or elevated body temperature, fever, rapid pulse rate and dehydration in the acute phase.