Yes: Usually subdural hematomas start when there is a traumatic injury, and the subdural can enlarge over the course of 1-2 days.
Answered 4/5/2014
4.9k views
Possibly: Usually a subdural hematoma starts after the head injury (ie. Fall). If the vessel that tears is small, it may slowly seep and the sdh grows over time, maybe over a day or two. Typically, sdh grows rather quickly, compressing the brain and causing a neurosurgical emergency.
Answered 9/8/2013
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