Trauma can describe two types of injury: outward and inward. Physical trauma is a serious bodily injury, while psychological trauma is an internal reaction to a life-threatening or life-changing event. The starkest contrast between the two is that the injury from physical trauma is usually visible, but the pain from psychological trauma is not.
There are two forms of physical trauma. Blunt force trauma occurs when an object strikes the body and results in injuries like broken bones, deep bruises, and concussions. Penetrating trauma occurs when an object pierces the body, creating an open wound. Surgery can also cause physical trauma and is sometimes called a controlled injury.
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