An unfortunate accident to the head, can lead to scalp injuries and/or skull fractures. Here is a short list of possible damages, but first the following is various layers of the head and brain:
۱٫ Scalp Wound: Blunt or penetrating trauma to the head can cause injury to the densely vascularized scalp, and significant blood loss can occur.
۲٫ Linear Skull Fracture
۳٫ Stellate: Multiple and radiating fracture from a point
۴٫ Comminuted: Fracture, creating fragments of bone
۵٫ Depressed skull fractures
More details are provided in the Specialized English handout, pp. 45-47.