Young children do have a problem regulating body temperature, especially whe fighting off a viral infection. If there is no rash then it is a case of managing symptoms until it goes down.
The important thing is to maintain fluid levels, signs of dehydration in a child include dry nappies, or very strong smelling nappies.
As it has gone on for more than 3 days, we do suggest popping back to the doctor with young children so he/she can check for signs of dehydration. The other risk with sustained high temp is febrile seizures but it happens less when temp less than 104.
This is a useful website, you may have seen it already:
http://www.netdoctor.co.uk/health_advice/facts/childrenfever.htm
Hope this information is useful
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