61 Year Oldmale Dibetic Kindey Issues Gangrene In Heel Of

61 year oldmale dibetic kindey issues gangrene in heel of foot a little loose bm s with a temp of 37.9 c should that be cosidered as a fever in his case .he Dr was worried that if he has a fever he should go to emerge incase of infection getting in blood. I am trying to covence him to go to er he said if it reaches 38 c he will go then your openion sorrycannot pay for info thank you for your time any how