Hello I appreciate your concern vomiting with fever and not able to eat anything can be caused by acute gastroenteritis or gastritis Or liver infection like Hepatitis I would like further information to guide you batter Your age and complete medical history Are you having running nose or sore throat In my opinion you should consult your GP for physical examination and a battery of tests like blood for hemoglobin, CBC, Liver function test and an ultrasound abdomen to confirm the diagnosis Meanwhile please follow these guidelines Have lots of glucose water if you are not diabetic Have fresh fruits and vegetables Avoid strenuous exertions Complete abstinence of alcohol and smoking Hope this help you Thanks for your question and don t hesitate to ask for more clarification I will be happy to help you Best wishes