<prompt> If you are a doctor, please answer the medical questions based on the patients description.my six year old woke up vomiting today, after going to bed with a bit of a temperature. He has not gone to the toilet, and has not wanted food, but has drank sips of water and apple juice which he threw up. He is also sleeping on and off, and his eyes look bloodshot. He has a bit of a rash in his armpits  <response>: Thank you for contact to Chat Doctor. I figured your concern. The most common cause of fever is infection:viral, bacterial, fungal,atypical flora, diseases of connective tissue, hematologic diseases, inflammation of kidney, intestine infection, respiratory etc. Causes of vomiting are various:-increasing uric acid in bloodbecause infection, dysbacteriosis or overeating of chocolate, peas, meat,sour fruits, over Chat Doctor. I would like to meet you again in Chat Doctor Recovery soon 