Child can drink anything without vomiting but can only eat a few bites of food and be full if eats more will throw up going on 4 days any ideas?

Kid vomiting: Inability to keep down just solids makes me think of some type of gastric outlet obstruction - this means things not emptying out of stomach into intestine properly. This is quite unusual in this age group. Could be something as simple as irritation in stomach from a virus to more serious things such as lymph nodes or tumor blocking the outlet. If not better by 7 days, needs peds GI eval and study.