Fever and stomach pain are considered to be caused by the invasion of bacteria or viruses, as well as microorganisms such as mycoplasma and chlamydia into the human body, when the body’s resistance is reduced, or when the immune function is deficient, invading the abdominal mucosa and causing disease, while some patients take some antibiotics and antibiotics orally when they have a fever, which can also cause abdominal pain and other adverse reactions. In addition, patients with fever can also cause damage to abdominal organs and organs, and inflammation of abdominal organs and organs can also spread to the peritoneum and cause stomach pain. Therefore, fever and stomach pain are caused by multiple factors and pathways, and it is important to identify the causes of fever and stomach pain, and then give symptomatic medication and advocate patients to rest more.