Thor didn't respond right away, staying focused on the wound. He saw the question, indicating that he did with a small flick of his eyes towards Loki's moving hands. But he didn't want to answer right away. He only answered after the wound was stitched well enough together.

Bad cut. Concussion. Can't leave.

He wouldn't let Loki try to make this journey while injured. Not with a head injury. It wasn't safe. They still needed to watch if there were any brain swelling.