5-year-old child ate a bun uncomfortable fever related to indigestion, acute gastroenteritis, can be given to adjust the diet, medication and so on. 1. indigestion: 5-year-old children eating buns fever related to indigestion, can use drugs to regulate intestinal flora, such as compound lactobacillus eosinophilus tablets; fever more than 38.5 ℃, you can apply some antipyretic drugs, such as ibuprofen, acetaminophen. 2. Acute gastroenteritis: after the child eats the buns contaminated by bacteria, it may cause acute gastroenteritis, which can also lead to the symptoms of fever, in this case, you can apply some antibacterial drugs, such as cefdinir, etc., but under the guidance of the doctor to use the drugs; fever over 38.5 ℃ should also use some antipyretic drugs. The 5-year-old child ate the bag uncomfortable, it is recommended that timely medical treatment, in order to better alleviate the condition, reduce the adverse effects on the body. All the above medicines should be taken under the guidance of a doctor.