AdvertisementHow A Simple Bump Can Cause An Insidious Brain InjuryJanuary 06, 2016Daniel ZwerdlingfacebookEmailAn MRI scan shows Bryan Arling's brain from above. The white-looking fluid is a subdural hematoma, or a collection of blood, that pushed part of his brain away from the skull, causing headaches and slowing his decision-making. (Courtesy of Dr. Ingrid Ott, Washington Radiology Associates)