Stomach distress followed by fever is a common clinical symptom that may be due to acute gastroenteritis or gastrointestinal flu. It is recommended to visit the hospital in time to determine the cause and treat the cause. Common causes and treatments are as follows: 1. Acute gastroenteritis: Patients have fever, abdominal pain, nausea, vomiting, diarrhea, general malaise and other symptoms due to unclean diet leading to infection of the organism by bacteria, viruses and other microorganisms. It is recommended to visit the gastroenterology department of the hospital, check the gastroscopy, and after the diagnosis, according to the results of the bacterial culture, use norfloxacin, ciprofloxacin, azithromycin and other antibiotics for treatment, and also need to take oral montelukast, bifidobacterium and other drugs to control abdominal pain, diarrhea and other gastrointestinal symptoms; 2, gastrointestinal flu: gastrointestinal flu is caused by a variety of viruses such as respiratory syncytial virus, adenovirus, rhinovirus and other common Cold, patients can be manifested as nausea, vomiting with fever. Since the human immune system can clear the virus under normal circumstances, the disease is self-limiting and generally does not require antiviral treatment, only symptomatic treatment, but patients with immunodeficiency need to apply antiviral drugs such as ribavirin and oseltamivir. Symptomatic treatment includes the application of non-steroidal anti-inflammatory drugs such as nimesulide and ibuprofen to relieve fever and montelukast to relieve watery stool diarrhea. Caution: Patients are generally in a state of gastrointestinal dysfunction at this time and are advised to avoid foods with high irritation and fat content during the onset of the disease. Foods that are highly stimulating include onions, fennel, garlic cloves, ginger, etc., as well as some condiments such as pepper and peppercorns, and high-fat foods such as fatty meats and butter. In addition, patients often have nausea, vomiting, diarrhea and other discomfort, it is recommended not to eat some cold, cold food. Patients can increase the intake of vitamin-rich (cabbage, kiwi) and high-protein (beef, eggs, milk) foods in moderation during the onset of the disease. Patients with severe vomiting and diarrhea can drink light saline in moderation to avoid electrolyte imbalance. Food should be as warm, soft and easy to digest as possible, and a semi-liquid or liquid diet can be chosen when the condition is severe.