Hi ! If it is confirmed that the rash
around his waistline is fungal, the fever
which he got now possibly not related. The rash needs to be evaluated by a dermatologist
. The fever if viral, will be ok in three to four days. In case the fever lasts more, you may have to take him to your treating doctor, who may go for a fever profile check up in the blood to arrive at a conclusion and treat him accordingly. Wishing your son an early recovery.