A skull fracture is a break in one or more bones of the skull, charged with protecting the brain, nerves, blood vessels and the inner ear. Although this is a very strong part of the body and is quite difficult to break the skull fracture can occur from falls, car accidents, some kind of physical aggression or head injuries. Among the clearest symptoms include: bleeding from the wound, which may be accompanied by bleeding ear, nose and eyes; hematomas; variations in the size of the pupils; confusion, imbalance, nausea, unconsciousness and headache. Therefore, when a person receives a blow on the head it is best to visit as soon as possible to a doctor to diagnose the extent of it and treatment, if necessary.