Potentially staff infection. Happens not from snake but other bacteria getting in after the fact. Get some neosporin and soak your hand in warm Epsom salt if worried. I live on a farm and uncovered cuts get pretty infected fast. If you start experience severe inflammation or all your muscles start burning from the inside get attention for it. They will give you some steroids or anti biotics. This has only happened to me once with third degree burns I left untreated. So that's worse case. Don't worry your body is strong. Neosporin and Epsom salt should fix you right up.