<s>[INST] Hi, My son is 17 months old. Within the last three weeks he had tummy bug and ear infection. His stool started being grey then it turned whitish which was accompanied with vomiting. It lasted 3-4 days. After two weeks he started it all over again, and he has just started having grey stools again, the third time within a short period of time. He doesn t really want to eat, and he lost lots of weight. We took him to the Gp, who said our son has mild ear infection and is not dehydrated. I am worried for him. He is so week now, when he walks he keeps falling all the time. [/INST] Hi... Thank you for consulting in Chat Doctor. This looks like viral illness with diarrhea and cold. It seems your kid is having viral diarrhea. Once it starts it will take 5-7 days to completely get better. Unless the kids having low urine output or very dull or excessively sleepy or blood in motion or green bilious vomiting...you need not worry. There is no need to use antibiotics unless there is blood in the motion. Antibiotics might worsen if unnecessarily used causing antibiotic associated diarrhea. I suggest you use zinc supplements (Z&D Chat Doctor.  </s>