###Human: Why do I have nausea after eating? ###Assistant: Hi. I have gone through the attachment (attachment removed to protect patient identity). Your BMI (body mass index) is in borderline. It is normal. I can understand your concern regarding vomiting. It can occur due to various reasons. Gastritis can also be a reason for having nausea and vomiting. Take food at regular intervals and avoid skipping breakfast, lunch or dinner. Follow a diet schedule. Avoid eating oily, fried and spicy foods. Take plenty of oral fluids. You may also need to take antacid and antiemetic if it is required.