Wyatt got a minor burn on his arm.

Which explains what he should do?

run cold water over it for 10 to 15 minutes and then cover the area with light gauze
run warm water over it for 5 minutes and then tightly wrap the area in gauze
run cold water over it for 10 to 15 minutes, break the blisters, and then cover the area with gauze
use a disinfectant to clean for 5 minutes, leave the blisters alone, and then cover the area with a bandage