Adults with diarrhea followed by fever are likely to have these symptoms because of the presence of an infection in the digestive tract. It can be caused by a bacterial infection or a viral infection. If it can be generally clarified which pathogen or what type of pathogen is present, the relevant medication can be applied in a targeted manner for treatment. Bacterial infections can be treated with antibiotics, such as levofloxacin or cephalosporin antibiotics. And if it is caused by a viral infection, you can also apply the appropriate antiviral drugs, such as ribavirin. Adults with diarrhea need to look at the diarrhea, there is pus and blood this may be dysentery, possibly caused by Shigella dysenteriae infection, again can also be treated with antibiotics. If there is no obvious pus and blood, but dilute watery, this means that there is likely to be dehydration, the patient should be given timely rehydration, which can be given orally. In cases of repeated vomiting and inability to drink water, intravenous rehydration can also be the mainstay. Fever should also be treated symptomatically. If the body temperature is high and the accompanying symptoms are heavy, you can apply appropriate drugs to reduce fever, you can choose oral ibuprofen, and when you can’t eat, you can also apply appropriate glucocorticoids.