My son if vomiting and has diarrhea there are no other symptoms and this happens to him every few days and others he is fine. i'm lost.

SEE YOUR DOCTOR: IF THIS A SITUATION THAT IS RECURRING YOU NEED TO SEE YOUR DOCTOR OR POSSIBLY A PEDIATRIC GASTROENTEROLOGIST ( INTESTINAL SPECIALIST) IF THIS HAS JUST BEEN A WEEK OR TWO THEN SOMETIMES VIRUSES CAN BE RECURRENT AND COME BACK HOPE HE FEELS BETTER SOON

Diarrhea: if indeed your child has these symptoms, it is not normal particularly if weight gain in inadequate. Causes range from infections to intolerance to certain food categories. A methodical evaluation is in order. Some initial labs that may be done include: CBC, ESR, albumin, stool pH and analysis for pathogens