If the patient is accompanied by high fever and diarrhea, most likely due to acute gastroenteritis, high fever and diarrhea are caused by: First, acute gastroenteritis in adults is mainly acute gastroenteritis caused by eating unclean food, including food that is expired or has been contaminated with bacteria. The main manifestations are abdominal pain, diarrhea, high fever, and patients with elevated white blood cells need to be treated with antibiotics and need to drink more water to speed up the excretion of bacteria. Second, if seen in children, it may be due to food accumulation, mainly manifested by reduced food intake, fever, abdominal pain and poor mental condition. Thirdly, the fever and diarrhea may be due to stress or parasitic infection. Fourth, it is considered to be caused by typhoid fever.