Needs evaluation: Your intuition is right a virus shouldn't last this long, and stomach viruses in general come and go quite quickly. The question is if he is overall better or not? The headache could be due to dehydration from volume losses (vomiting/diarrhea). So I would try fluids now--chicken soup, pedialyte etc. DEFINITELY would go back to the docs though for more evaluation. You don't want to miss something.
Answered 9/5/2016
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2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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