Your body is 98.6 degrees, the palm of your hand is probably in the low 90's if it feels warm to your hand then the temperature is higher then the low 90's, which is too warm for your snake (the hot spot should be between 88-90 degrees F). High temperatures are far more harmful to snakes then low temperatures. Temperature is one thing that you never want to guess at when keeping reptiles. Two of the most essential things to have when keeping reptiles is an accurate thermostat and an accurate way to measure the temperature. I personally would recommend these two items.
One of these.
VE thermostats or Hydrofarm thermostat
And one of these.
pe-2 Tempgun or Amazon Tempgun
If your snake just shed, I would say that looks like a burn.