Subdural hematoma often develops as a complication after a head injury. Acute subdural hematoma progresses rapidly, with symptoms usually appearing within 24 hours of the injury. Rapid deterioration occurs thereafter. Subacute subdural hematoma usually develops symptoms within two to 10 days after the injury because of a slightly slower leakage of blood into the subdural area. Typically, symptoms of the original injury improve for a period, followed by development of symptoms of subdural hematoma.
Subdural hematoma can occur in people of all ages.
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