One-year-old babies who vomit first and then have diarrhea are likely to be infected with rotavirus enteritis, which has a high incidence between the ages of 6 months and 2 years, and is common in the fall and winter. This part of the baby is usually vomiting first, the number of vomiting can be up to a dozen times. The number of days of vomiting varies from half a day to two to three days, and the vomiting usually stops when the stool starts to become thin. The stool is usually egg-flake soup-like or watery in nature. The number of stools can vary from five or six to more than ten times a day. Some babies may have a fever, and if the baby has a dry mouth and lips and a reduced urine output, it means that dehydration has occurred.