Blunt trauma is caused when a force is exerted against the human body.
The outside or visible region may be bruised or it may not. However this type of trauma is often misleading or is missed during initial exams. The trauma is not just localized to the skin, but also to the bones and organs underneath. It is possible to bleed to death and never show any outward signs until the person goes into irreversible shock. Irreversible shock is just that, irreversible and can lead to death.