Vomiting with diarrhea can be a viral infection, but more often it is a bacterial infection. Viral infections are common in children, rotavirus is common, and there may be other intestinal viruses, usually with a short period of fever and vomiting after the onset of the disease, followed by diarrhea of varying degrees. If there is no complication, pay attention to reasonable hydration, with the use of Chinese herbal medicine such as Banlangen antiviral, most will be cured within a week. In adults, bacterial infections such as Shigella and Salmonella can cause diarrhea and in some cases, pus and blood stools. The treatment is based on the application of effective antibiotics, together with symptomatic treatment such as rehydration.