What causes vomiting and diarrhea in a toddler?
Patient: Hi, my 4 year old son has been vomitting and had diarrhea for well over a month. He has no fever with it at all. He is ok for a couple of days and then starts it all over for 2 to 5 days. He has seen the doctor and they can t figure anything out. He has lost 10 lbs in like 3 weeks. He is already so little for his age. Please help me, I am running outta options. Doctor: Hello,  You tell me your toddler is having intermittent vomiting and diarrhoea.    The intermittent aspect of his illness suggests that he might has cyclic vomiting syndrome(CVS).   About one-third of the child who have vomiting also have diarrhea. He is the right age.  Usually, the diagnosis is more likely if there has been a longer history of illness.    However, he has had a significant weight loss and it would not be in his best interest to wait any longer.   I want you to take him for evaluation to a pediatric gastroenterologist AS SOON AS YOU CAN.  Hope I have answered your query. Let me know if I can assist you further.  Take care  Regards, Dr Arnold Zedd, Pediatrician