Many things: But the most likely one if you were previously well, is some type of viral infection, or a flu like illness. A particular viral infection can affect some people mildly and some people very severe. If you symptoms are mild, they should pass in about a week. High fever, vomiting and/or diarrhea are symptoms usually requiring a visit to a doctor. Rest, fluids, acetaminophen are advised now.
Answered 3/4/2016
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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