4 doctors weighed in:
My 3 year old son have a high fever for three days and just started vomiting today.. His sister has a fever also. What could this be? What should I do
4 doctors weighed in

Dr. Randy Baker
Holistic Medicine
2 doctors agree
In brief: Probably viral but..
It is impossible to know for certain from these symptoms, but the most likely cause is a viral infection, possibly roseola, which is common in 3 yo's & has high fever with few other symptoms (though vomiting can be one of them).
Classically the fever goes away after 3-5 days & then a rash appears, so it may be hard to know if he has this for a couple more days. Please see "comment" below for more.

In brief: Probably viral but..
It is impossible to know for certain from these symptoms, but the most likely cause is a viral infection, possibly roseola, which is common in 3 yo's & has high fever with few other symptoms (though vomiting can be one of them).
Classically the fever goes away after 3-5 days & then a rash appears, so it may be hard to know if he has this for a couple more days. Please see "comment" below for more.
Dr. Randy Baker
Dr. Randy Baker
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1 comment
Dr. Randy Baker
Fever is how the body fights infection so it may be best to not give tylenol or other fever-reducers! Vomiting, while unpleasant, is only serious if he becomes dehydrated, so emphasize fluids including things like vegetable broth for electrolytes. Seek medical care if he can't keep fluids down or has signs of a possible bacterial infection like earache or strep throat. Sister may have same thing!
Dr. Pavel Conovalciuc
Family Medicine
1 doctor agrees
In brief: Some tips
3 days of fever and vomiting - take your son to see a medical provider - urgent care or er these days.
It may be a simple cold or the flu (more likely) or may be a stomach flu (viral gastroenteritis). Vomiting can lead to quick dehydration, so you should seek help promptly.

In brief: Some tips
3 days of fever and vomiting - take your son to see a medical provider - urgent care or er these days.
It may be a simple cold or the flu (more likely) or may be a stomach flu (viral gastroenteritis). Vomiting can lead to quick dehydration, so you should seek help promptly.
Dr. Pavel Conovalciuc
Dr. Pavel Conovalciuc
Thank
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