My 21 month old son vomits quite often. it usually begin with him coughing a little then having projectile vomiting. He is continuously mucousy even with humidifiers, steamed bathrooms and saline spray. We thought that the mucous was the cause of his vomit, but then he also vomits sometimes when he s in the car, or runs around too much. When i brought this up to his pediatrician they assured me it was because he has a weak stomach or because he just gets too excited. There is no fever or any other issues after he vomits, he doesn t seem cranky after wards and he doesn t even cry. His vomit looks like ricotta cheese chunks with lots of fluid.
As per you give detail in your history that your child vomit with cough or when he run around too much or in car.  I want some more information.  Since when is he has these symptoms ? What is frequency of these symptoms ? Does he have recurrent cough? Two possibility in my view. More chance that he is cough problem. For that if symptoms are so frequent we give medicine so that problem control.  Other possible she has more acid production if stomach, for that I would to give medicine which reduce the acidity like lansoprazole.  So if was your treating doctor I would to have more detail for proper treatment with you healthy life.