Matter of degree
There are 3 degrees of burn-1, 2, and 3 graded by severity.
would be a typical 1st degree burn, blistering from steam or a hot surface that is very painful would be typical for grade2. In grade3 burns
the injury is so severe that the pain nerves are destroyed and paradoxically there is less pain. The crucial factor is how much surface area of the skin is involved.