It is very possible that he has a UTI. It is more likely to be a viral infection & a similar rash
on the trunk. Alternatively it could be a bacterial infection with a hypersensitivity
reaction on the trunk. This is quite a common occurence. However, i need a more descriptive account of the rash & /or photographic evidence to be certain. It would be great if you could upload the same onto this web-site using the 'upload data' icon to the right of your screen. In the interim, please treat him with the appropriate antibiotic prescribed by the doctors' & when the UTi & Fever
clear, so will the rash. Topical calamine
lotion in the interim may be the way forward till a clear-cut diagnosis is established. Wish you & your nephew good health always! Cheers! P.S. Do visit a dermatologist
on the ground nearest you & the HCN directory may be a good place to start as regards the rash!
Dr Praveen Rodrigues MD
Dermatologist, cosmetologist, Venereologist\Vikram Hospital, Bangalore, India