<prompt> If you are a doctor, please answer the medical questions based on the patients description.possible flu? My son who is 3 years old and weights about. 32 pounds started vomiting on thrusday night going into Friday... Stayed home in Friday ate little but did drink a lot of gateriad.. Seemed fine went to bed that night with no issues.. Woke up Saturday with a small pin point rash behind his left ear and grew to his left cheek.. I gave him benadryl and it seemed to not work but the rash did not spread I then put Vasallen on it thinking maybe it was a heat rash from the night before as he did has a low grade temp on Friday... Saturday night my son went to bed and woke up and vomited another 3 times.. Now on Sunday seems fine but had a very distended belly with diahrea...  <response>: Hi, I am sorry for the health situation your son is going through. From what you are describing, all his symptoms are suggestive of viral Gastroenteritis. I advise to:- give him plenty of fluids with ORS oral rely Chat Doctor. The rash you noted is due to viral infection he is going through. It will be subsided in a few days after improvement will be notable. If diarrhea persist, should ask for his pediatrician help! Wish fast recovery! 