Elsa touched Chris' chest on the part where the purple discoloration was located. Not only bruises were on his chest but there was also an open wound that was not bleeding but also not healing. It looks like a burnt meat.
"Does it hurt?" Elsa asked without looking at Chris her eyes were fixed on his wound. She was wondering how strong Chris was. If it happened to a normal person, that person would surely be dead by now.
Since she was so busy examining his chest, she didn't see how Chris was looking and smiling at her. He was deeply touched to see how Elsa was so worried about him. It just shows that she truly cares about him.