See doctor ASAP!
An epidural hematoma
is caused by a blow to the side of the head, in the temple area.
These head injuries involved bleeding that is initially confined between membranes within the skull cavity
, so a person may appear totally normal at first. However, if left undiagnosed and untreated, the pressure builds from the accumulating blood can can be rapidly fatal.
Answer assisted by Allison Greco, Medical Student