<s>[INST] My three year old boy had a high fever yesterday (103). It seems to have cleared up today and he is acting normal, but now has a rash on the insides of his feet and all around his trunk. He does not seem to be bothered by it...should I be concerned? [/INST] it could be a viral rash and can be diagnosed by examining the patient and doing appropriate investigations.if vesiculo bullous it could be varicella rash which usually appears over the trunk initially. </s>