If you have gastroenteritis, it is important to focus on consuming light foods such as soda crackers, soups, broths, rice, and white bread. Avoid heavy and/or sweet foods like red meat, undiluted fruit juices, and milk. When you start eating and drinking again, do so very gradually, for example, taking a sip every 4-5 minutes. You should notice an improvement in your condition each day. If you have any other questions, feel free to ask for assistance.