<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi ...my 4 yr old grandson has been sick for 2 weeks he feels bad off and on isn t eating much has seen MD 3 times and been to er they can t find anything wrong but he has fever off and on...but tonight when he vomited it was bloodand i Am really afraid for him any ideas what it might be?  <response>: Hi, I understand your concern. -. First keep a record of his temperature reading of the fever by using thermometer for 2 days every 2hourly. Sometime body gets warm, because of weakness, still temperature remains normal. - If you find definite risefall in temperature, your child needs an expert child specialists consultation, needful investigations specific treatment. - The blood in vomit must be due to starving out of loosing appetite. Offer him could milknot frozenon-spicy food to avoid it, Consult your doctor for use of Sanitizing syrup., in case it repeats. - For lac of appetite, mild rise in body temperature- he needs- - Rest, easy to digest, nutritive diet that he likes.Chicken soupboiled egg, Fresh fruitsjuicesin multiple small servings - Vitaminspecially B complexsupplements help in raising appetite level. Ideally lac to bacillus containing tonic help. - Protect him from extreme weather allergens unhealthy food till he regains his resistance. He should be all right within 15 days. Thanks. 