That would explain both her unconsciousness and the lack of an obvious injury.
Other than a split lip, he showed no obvious injury.
Kaylee was down for the count, but with no obvious injuries.
Her eyes were closed, but she appeared to be breathing normally and he couldn't see any obvious injuries.
He didn't have any serious burns or other obvious injuries, so the doctor treated him for shock.
She had no obvious injuries apart from a broken shoulder blade.
There are no obvious physical injuries to either mother or child.
The obvious injury was to her hip; she took six weeks off and had physical therapy.
Surveying him quickly with her eyes and mind, she saw no obvious injury that could account for it- Yes.
Usually, the bleeding results from obvious injuries that require rapid medical attention.